1

Trunking 101Radio Technology Presentation

July 13 2007

Rey Freeman GeoComm

2

Presentation Agenda

Trunking Radio Systems ldquo101rdquobull Trunked radio vs conventional radio systems

Simulcast transmitting technology Voting receiver system technology Digital vs analog modulation technology

3

ldquoTrunking 101rdquo

CentralController

4

What is ldquoTrunkingrdquo

It is NOT a term that ldquobelongsrdquo to Motorola MaCom or any other manufacturer

It is NOT a term exclusively for radio systems It IS a generic term used to describe

ldquoThe sharing of a limited number of communications paths (or Trunks) among Many Usersrdquo

5

Conventional vs Trunked

Conventional Radio (repeater) systembull Uses a dedicated radio frequency for each

radio channel in a system (unless sharing a channel)

bull A Channel = a Frequency (Ie 154235 Mhz is County Fire)

bull Each frequency is assigned to a group of users

6

TXRX

FD

Fire Channel154235 MhzTX

RX

EMS Channel155340

TXRX

Law Repeater Channel 155625 Mhz

EMS

PD

7

TXRX

FD

Fire Channel154235 Mhz

TXRX

EMS Channel155340

TXRX

Law Repeater Channel 155625 Mhz

EMS

PD1PD2

X

8

Your Bank Tellers ndash as ldquoConventionalrdquo

PD FireEMS PWAdmin

EMS FD

FDPD

PD

Queueby

Account

9

Conventional vs Trunked

Conventional Radio (base or repeater) systembull A Channel = a Frequencybull If a channel is in use radio user must wait in

ldquoqueuerdquo before being able to transmit on the system

bull hellipand a new frequency must be obtained each time another ldquochannelrdquo is needed in the radio system

bull The system is limited by the number of frequencies in the systemhellip

10

Trunked Radio Systems

CentralController

11

Conventional vs Trunked

Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to

create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800

Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-

generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo

12

Conventional vs Trunked

Trunked Radio (repeater) systembull The entire system is managed by a computer

often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-

controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo

13

EMS

1 to 28 Channels

CH 1

CentralController

TX RX

CH 2

RXTX

CH 3

RXTX

CH 4

RXTX

CH 28

RXTX

ControlChannel

PD

Basic Trunking Diagram

FD

14

Your Bank Tellers ndash as ldquoTrunkedrdquo

Director CH 5CH 3 CH 4CH 2

EMS FD

PD

PD

Queueby

FirstAvailable

Teller

FD

IN

15

Conventional vs Trunked

Trunked Radio Benefits bull Greatly improved usage of scarce radio

frequenciesbull Greater overall radio system flexibility

includingChannel (Talk Group) capabilitiesVarious user features including Emergency

Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit

bull Brings radio users together on a common radio system

bull Consistency in radio coverage

16

So How Does It Work

17

Control Channel continuously transmits system data to all radios PD

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FDEMS

18

Radio user presses TX button and radio information is sent via control channel to

Central Controller

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

19

Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios

selected on same Talk Group

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

20

Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the

voice transmission

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

21

When transmission is completed all units revert back to Control Channel

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

2

Presentation Agenda

Trunking Radio Systems ldquo101rdquobull Trunked radio vs conventional radio systems

Simulcast transmitting technology Voting receiver system technology Digital vs analog modulation technology

3

ldquoTrunking 101rdquo

CentralController

4

What is ldquoTrunkingrdquo

It is NOT a term that ldquobelongsrdquo to Motorola MaCom or any other manufacturer

It is NOT a term exclusively for radio systems It IS a generic term used to describe

ldquoThe sharing of a limited number of communications paths (or Trunks) among Many Usersrdquo

5

Conventional vs Trunked

Conventional Radio (repeater) systembull Uses a dedicated radio frequency for each

radio channel in a system (unless sharing a channel)

bull A Channel = a Frequency (Ie 154235 Mhz is County Fire)

bull Each frequency is assigned to a group of users

6

TXRX

FD

Fire Channel154235 MhzTX

RX

EMS Channel155340

TXRX

Law Repeater Channel 155625 Mhz

EMS

PD

7

TXRX

FD

Fire Channel154235 Mhz

TXRX

EMS Channel155340

TXRX

Law Repeater Channel 155625 Mhz

EMS

PD1PD2

X

8

Your Bank Tellers ndash as ldquoConventionalrdquo

PD FireEMS PWAdmin

EMS FD

FDPD

PD

Queueby

Account

9

Conventional vs Trunked

Conventional Radio (base or repeater) systembull A Channel = a Frequencybull If a channel is in use radio user must wait in

ldquoqueuerdquo before being able to transmit on the system

bull hellipand a new frequency must be obtained each time another ldquochannelrdquo is needed in the radio system

bull The system is limited by the number of frequencies in the systemhellip

10

Trunked Radio Systems

CentralController

11

Conventional vs Trunked

Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to

create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800

Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-

generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo

12

Conventional vs Trunked

Trunked Radio (repeater) systembull The entire system is managed by a computer

often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-

controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo

13

EMS

1 to 28 Channels

CH 1

CentralController

TX RX

CH 2

RXTX

CH 3

RXTX

CH 4

RXTX

CH 28

RXTX

ControlChannel

PD

Basic Trunking Diagram

FD

14

Your Bank Tellers ndash as ldquoTrunkedrdquo

Director CH 5CH 3 CH 4CH 2

EMS FD

PD

PD

Queueby

FirstAvailable

Teller

FD

IN

15

Conventional vs Trunked

Trunked Radio Benefits bull Greatly improved usage of scarce radio

frequenciesbull Greater overall radio system flexibility

includingChannel (Talk Group) capabilitiesVarious user features including Emergency

Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit

bull Brings radio users together on a common radio system

bull Consistency in radio coverage

16

So How Does It Work

17

Control Channel continuously transmits system data to all radios PD

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FDEMS

18

Radio user presses TX button and radio information is sent via control channel to

Central Controller

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

19

Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios

selected on same Talk Group

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

20

Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the

voice transmission

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

21

When transmission is completed all units revert back to Control Channel

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

3

ldquoTrunking 101rdquo

CentralController

4

What is ldquoTrunkingrdquo

It is NOT a term that ldquobelongsrdquo to Motorola MaCom or any other manufacturer

It is NOT a term exclusively for radio systems It IS a generic term used to describe

ldquoThe sharing of a limited number of communications paths (or Trunks) among Many Usersrdquo

5

Conventional vs Trunked

Conventional Radio (repeater) systembull Uses a dedicated radio frequency for each

radio channel in a system (unless sharing a channel)

bull A Channel = a Frequency (Ie 154235 Mhz is County Fire)

bull Each frequency is assigned to a group of users

6

TXRX

FD

Fire Channel154235 MhzTX

RX

EMS Channel155340

TXRX

Law Repeater Channel 155625 Mhz

EMS

PD

7

TXRX

FD

Fire Channel154235 Mhz

TXRX

EMS Channel155340

TXRX

Law Repeater Channel 155625 Mhz

EMS

PD1PD2

X

8

Your Bank Tellers ndash as ldquoConventionalrdquo

PD FireEMS PWAdmin

EMS FD

FDPD

PD

Queueby

Account

9

Conventional vs Trunked

Conventional Radio (base or repeater) systembull A Channel = a Frequencybull If a channel is in use radio user must wait in

ldquoqueuerdquo before being able to transmit on the system

bull hellipand a new frequency must be obtained each time another ldquochannelrdquo is needed in the radio system

bull The system is limited by the number of frequencies in the systemhellip

10

Trunked Radio Systems

CentralController

11

Conventional vs Trunked

Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to

create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800

Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-

generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo

12

Conventional vs Trunked

Trunked Radio (repeater) systembull The entire system is managed by a computer

often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-

controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo

13

EMS

1 to 28 Channels

CH 1

CentralController

TX RX

CH 2

RXTX

CH 3

RXTX

CH 4

RXTX

CH 28

RXTX

ControlChannel

PD

Basic Trunking Diagram

FD

14

Your Bank Tellers ndash as ldquoTrunkedrdquo

Director CH 5CH 3 CH 4CH 2

EMS FD

PD

PD

Queueby

FirstAvailable

Teller

FD

IN

15

Conventional vs Trunked

Trunked Radio Benefits bull Greatly improved usage of scarce radio

frequenciesbull Greater overall radio system flexibility

includingChannel (Talk Group) capabilitiesVarious user features including Emergency

Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit

bull Brings radio users together on a common radio system

bull Consistency in radio coverage

16

So How Does It Work

17

Control Channel continuously transmits system data to all radios PD

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FDEMS

18

Radio user presses TX button and radio information is sent via control channel to

Central Controller

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

19

Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios

selected on same Talk Group

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

20

Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the

voice transmission

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

21

When transmission is completed all units revert back to Control Channel

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

4

What is ldquoTrunkingrdquo

It is NOT a term that ldquobelongsrdquo to Motorola MaCom or any other manufacturer

It is NOT a term exclusively for radio systems It IS a generic term used to describe

ldquoThe sharing of a limited number of communications paths (or Trunks) among Many Usersrdquo

5

Conventional vs Trunked

Conventional Radio (repeater) systembull Uses a dedicated radio frequency for each

radio channel in a system (unless sharing a channel)

bull A Channel = a Frequency (Ie 154235 Mhz is County Fire)

bull Each frequency is assigned to a group of users

6

TXRX

FD

Fire Channel154235 MhzTX

RX

EMS Channel155340

TXRX

Law Repeater Channel 155625 Mhz

EMS

PD

7

TXRX

FD

Fire Channel154235 Mhz

TXRX

EMS Channel155340

TXRX

Law Repeater Channel 155625 Mhz

EMS

PD1PD2

X

8

Your Bank Tellers ndash as ldquoConventionalrdquo

PD FireEMS PWAdmin

EMS FD

FDPD

PD

Queueby

Account

9

Conventional vs Trunked

Conventional Radio (base or repeater) systembull A Channel = a Frequencybull If a channel is in use radio user must wait in

ldquoqueuerdquo before being able to transmit on the system

bull hellipand a new frequency must be obtained each time another ldquochannelrdquo is needed in the radio system

bull The system is limited by the number of frequencies in the systemhellip

10

Trunked Radio Systems

CentralController

11

Conventional vs Trunked

Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to

create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800

Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-

generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo

12

Conventional vs Trunked

Trunked Radio (repeater) systembull The entire system is managed by a computer

often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-

controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo

13

EMS

1 to 28 Channels

CH 1

CentralController

TX RX

CH 2

RXTX

CH 3

RXTX

CH 4

RXTX

CH 28

RXTX

ControlChannel

PD

Basic Trunking Diagram

FD

14

Your Bank Tellers ndash as ldquoTrunkedrdquo

Director CH 5CH 3 CH 4CH 2

EMS FD

PD

PD

Queueby

FirstAvailable

Teller

FD

IN

15

Conventional vs Trunked

Trunked Radio Benefits bull Greatly improved usage of scarce radio

frequenciesbull Greater overall radio system flexibility

includingChannel (Talk Group) capabilitiesVarious user features including Emergency

Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit

bull Brings radio users together on a common radio system

bull Consistency in radio coverage

16

So How Does It Work

17

Control Channel continuously transmits system data to all radios PD

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FDEMS

18

Radio user presses TX button and radio information is sent via control channel to

Central Controller

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

19

Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios

selected on same Talk Group

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

20

Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the

voice transmission

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

21

When transmission is completed all units revert back to Control Channel

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

5

Conventional vs Trunked

Conventional Radio (repeater) systembull Uses a dedicated radio frequency for each

radio channel in a system (unless sharing a channel)

bull A Channel = a Frequency (Ie 154235 Mhz is County Fire)

bull Each frequency is assigned to a group of users

6

TXRX

FD

Fire Channel154235 MhzTX

RX

EMS Channel155340

TXRX

Law Repeater Channel 155625 Mhz

EMS

PD

7

TXRX

FD

Fire Channel154235 Mhz

TXRX

EMS Channel155340

TXRX

Law Repeater Channel 155625 Mhz

EMS

PD1PD2

X

8

Your Bank Tellers ndash as ldquoConventionalrdquo

PD FireEMS PWAdmin

EMS FD

FDPD

PD

Queueby

Account

9

Conventional vs Trunked

Conventional Radio (base or repeater) systembull A Channel = a Frequencybull If a channel is in use radio user must wait in

ldquoqueuerdquo before being able to transmit on the system

bull hellipand a new frequency must be obtained each time another ldquochannelrdquo is needed in the radio system

bull The system is limited by the number of frequencies in the systemhellip

10

Trunked Radio Systems

CentralController

11

Conventional vs Trunked

Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to

create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800

Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-

generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo

12

Conventional vs Trunked

Trunked Radio (repeater) systembull The entire system is managed by a computer

often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-

controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo

13

EMS

1 to 28 Channels

CH 1

CentralController

TX RX

CH 2

RXTX

CH 3

RXTX

CH 4

RXTX

CH 28

RXTX

ControlChannel

PD

Basic Trunking Diagram

FD

14

Your Bank Tellers ndash as ldquoTrunkedrdquo

Director CH 5CH 3 CH 4CH 2

EMS FD

PD

PD

Queueby

FirstAvailable

Teller

FD

IN

15

Conventional vs Trunked

Trunked Radio Benefits bull Greatly improved usage of scarce radio

frequenciesbull Greater overall radio system flexibility

includingChannel (Talk Group) capabilitiesVarious user features including Emergency

Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit

bull Brings radio users together on a common radio system

bull Consistency in radio coverage

16

So How Does It Work

17

Control Channel continuously transmits system data to all radios PD

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FDEMS

18

Radio user presses TX button and radio information is sent via control channel to

Central Controller

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

19

Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios

selected on same Talk Group

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

20

Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the

voice transmission

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

21

When transmission is completed all units revert back to Control Channel

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

6

TXRX

FD

Fire Channel154235 MhzTX

RX

EMS Channel155340

TXRX

Law Repeater Channel 155625 Mhz

EMS

PD

7

TXRX

FD

Fire Channel154235 Mhz

TXRX

EMS Channel155340

TXRX

Law Repeater Channel 155625 Mhz

EMS

PD1PD2

X

8

Your Bank Tellers ndash as ldquoConventionalrdquo

PD FireEMS PWAdmin

EMS FD

FDPD

PD

Queueby

Account

9

Conventional vs Trunked

Conventional Radio (base or repeater) systembull A Channel = a Frequencybull If a channel is in use radio user must wait in

ldquoqueuerdquo before being able to transmit on the system

bull hellipand a new frequency must be obtained each time another ldquochannelrdquo is needed in the radio system

bull The system is limited by the number of frequencies in the systemhellip

10

Trunked Radio Systems

CentralController

11

Conventional vs Trunked

Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to

create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800

Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-

generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo

12

Conventional vs Trunked

Trunked Radio (repeater) systembull The entire system is managed by a computer

often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-

controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo

13

EMS

1 to 28 Channels

CH 1

CentralController

TX RX

CH 2

RXTX

CH 3

RXTX

CH 4

RXTX

CH 28

RXTX

ControlChannel

PD

Basic Trunking Diagram

FD

14

Your Bank Tellers ndash as ldquoTrunkedrdquo

Director CH 5CH 3 CH 4CH 2

EMS FD

PD

PD

Queueby

FirstAvailable

Teller

FD

IN

15

Conventional vs Trunked

Trunked Radio Benefits bull Greatly improved usage of scarce radio

frequenciesbull Greater overall radio system flexibility

includingChannel (Talk Group) capabilitiesVarious user features including Emergency

Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit

bull Brings radio users together on a common radio system

bull Consistency in radio coverage

16

So How Does It Work

17

Control Channel continuously transmits system data to all radios PD

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FDEMS

18

Radio user presses TX button and radio information is sent via control channel to

Central Controller

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

19

Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios

selected on same Talk Group

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

20

Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the

voice transmission

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

21

When transmission is completed all units revert back to Control Channel

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

7

TXRX

FD

Fire Channel154235 Mhz

TXRX

EMS Channel155340

TXRX

Law Repeater Channel 155625 Mhz

EMS

PD1PD2

X

8

Your Bank Tellers ndash as ldquoConventionalrdquo

PD FireEMS PWAdmin

EMS FD

FDPD

PD

Queueby

Account

9

Conventional vs Trunked

Conventional Radio (base or repeater) systembull A Channel = a Frequencybull If a channel is in use radio user must wait in

ldquoqueuerdquo before being able to transmit on the system

bull hellipand a new frequency must be obtained each time another ldquochannelrdquo is needed in the radio system

bull The system is limited by the number of frequencies in the systemhellip

10

Trunked Radio Systems

CentralController

11

Conventional vs Trunked

Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to

create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800

Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-

generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo

12

Conventional vs Trunked

Trunked Radio (repeater) systembull The entire system is managed by a computer

often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-

controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo

13

EMS

1 to 28 Channels

CH 1

CentralController

TX RX

CH 2

RXTX

CH 3

RXTX

CH 4

RXTX

CH 28

RXTX

ControlChannel

PD

Basic Trunking Diagram

FD

14

Your Bank Tellers ndash as ldquoTrunkedrdquo

Director CH 5CH 3 CH 4CH 2

EMS FD

PD

PD

Queueby

FirstAvailable

Teller

FD

IN

15

Conventional vs Trunked

Trunked Radio Benefits bull Greatly improved usage of scarce radio

frequenciesbull Greater overall radio system flexibility

includingChannel (Talk Group) capabilitiesVarious user features including Emergency

Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit

bull Brings radio users together on a common radio system

bull Consistency in radio coverage

16

So How Does It Work

17

Control Channel continuously transmits system data to all radios PD

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FDEMS

18

Radio user presses TX button and radio information is sent via control channel to

Central Controller

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

19

Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios

selected on same Talk Group

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

20

Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the

voice transmission

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

21

When transmission is completed all units revert back to Control Channel

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

8

Your Bank Tellers ndash as ldquoConventionalrdquo

PD FireEMS PWAdmin

EMS FD

FDPD

PD

Queueby

Account

9

Conventional vs Trunked

Conventional Radio (base or repeater) systembull A Channel = a Frequencybull If a channel is in use radio user must wait in

ldquoqueuerdquo before being able to transmit on the system

bull hellipand a new frequency must be obtained each time another ldquochannelrdquo is needed in the radio system

bull The system is limited by the number of frequencies in the systemhellip

10

Trunked Radio Systems

CentralController

11

Conventional vs Trunked

Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to

create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800

Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-

generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo

12

Conventional vs Trunked

Trunked Radio (repeater) systembull The entire system is managed by a computer

often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-

controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo

13

EMS

1 to 28 Channels

CH 1

CentralController

TX RX

CH 2

RXTX

CH 3

RXTX

CH 4

RXTX

CH 28

RXTX

ControlChannel

PD

Basic Trunking Diagram

FD

14

Your Bank Tellers ndash as ldquoTrunkedrdquo

Director CH 5CH 3 CH 4CH 2

EMS FD

PD

PD

Queueby

FirstAvailable

Teller

FD

IN

15

Conventional vs Trunked

Trunked Radio Benefits bull Greatly improved usage of scarce radio

frequenciesbull Greater overall radio system flexibility

includingChannel (Talk Group) capabilitiesVarious user features including Emergency

Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit

bull Brings radio users together on a common radio system

bull Consistency in radio coverage

16

So How Does It Work

17

Control Channel continuously transmits system data to all radios PD

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FDEMS

18

Radio user presses TX button and radio information is sent via control channel to

Central Controller

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

19

Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios

selected on same Talk Group

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

20

Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the

voice transmission

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

21

When transmission is completed all units revert back to Control Channel

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

9

Conventional vs Trunked

Conventional Radio (base or repeater) systembull A Channel = a Frequencybull If a channel is in use radio user must wait in

ldquoqueuerdquo before being able to transmit on the system

bull hellipand a new frequency must be obtained each time another ldquochannelrdquo is needed in the radio system

bull The system is limited by the number of frequencies in the systemhellip

10

Trunked Radio Systems

CentralController

11

Conventional vs Trunked

Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to

create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800

Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-

generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo

12

Conventional vs Trunked

Trunked Radio (repeater) systembull The entire system is managed by a computer

often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-

controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo

13

EMS

1 to 28 Channels

CH 1

CentralController

TX RX

CH 2

RXTX

CH 3

RXTX

CH 4

RXTX

CH 28

RXTX

ControlChannel

PD

Basic Trunking Diagram

FD

14

Your Bank Tellers ndash as ldquoTrunkedrdquo

Director CH 5CH 3 CH 4CH 2

EMS FD

PD

PD

Queueby

FirstAvailable

Teller

FD

IN

15

Conventional vs Trunked

Trunked Radio Benefits bull Greatly improved usage of scarce radio

frequenciesbull Greater overall radio system flexibility

includingChannel (Talk Group) capabilitiesVarious user features including Emergency

Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit

bull Brings radio users together on a common radio system

bull Consistency in radio coverage

16

So How Does It Work

17

Control Channel continuously transmits system data to all radios PD

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FDEMS

18

Radio user presses TX button and radio information is sent via control channel to

Central Controller

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

19

Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios

selected on same Talk Group

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

20

Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the

voice transmission

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

21

When transmission is completed all units revert back to Control Channel

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

10

Trunked Radio Systems

CentralController

11

Conventional vs Trunked

Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to

create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800

Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-

generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo

12

Conventional vs Trunked

Trunked Radio (repeater) systembull The entire system is managed by a computer

often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-

controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo

13

EMS

1 to 28 Channels

CH 1

CentralController

TX RX

CH 2

RXTX

CH 3

RXTX

CH 4

RXTX

CH 28

RXTX

ControlChannel

PD

Basic Trunking Diagram

FD

14

Your Bank Tellers ndash as ldquoTrunkedrdquo

Director CH 5CH 3 CH 4CH 2

EMS FD

PD

PD

Queueby

FirstAvailable

Teller

FD

IN

15

Conventional vs Trunked

Trunked Radio Benefits bull Greatly improved usage of scarce radio

frequenciesbull Greater overall radio system flexibility

includingChannel (Talk Group) capabilitiesVarious user features including Emergency

Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit

bull Brings radio users together on a common radio system

bull Consistency in radio coverage

16

So How Does It Work

17

Control Channel continuously transmits system data to all radios PD

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FDEMS

18

Radio user presses TX button and radio information is sent via control channel to

Central Controller

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

19

Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios

selected on same Talk Group

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

20

Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the

voice transmission

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

21

When transmission is completed all units revert back to Control Channel

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

11

Conventional vs Trunked

Trunked Radio (repeater) systembull Uses a group of similar radio frequencies to

create a ldquopoolrdquo for radio system users to accessbull Systems can be built using VHF UHF or 800

Mhzbull A Channel is NOT a Frequencyhellip(generally)bull A Channel (on your radio) is now a computer-

generated codebull hellipand are now referred to as ldquoTalk Groupsrdquo

12

Conventional vs Trunked

Trunked Radio (repeater) systembull The entire system is managed by a computer

often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-

controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo

13

EMS

1 to 28 Channels

CH 1

CentralController

TX RX

CH 2

RXTX

CH 3

RXTX

CH 4

RXTX

CH 28

RXTX

ControlChannel

PD

Basic Trunking Diagram

FD

14

Your Bank Tellers ndash as ldquoTrunkedrdquo

Director CH 5CH 3 CH 4CH 2

EMS FD

PD

PD

Queueby

FirstAvailable

Teller

FD

IN

15

Conventional vs Trunked

Trunked Radio Benefits bull Greatly improved usage of scarce radio

frequenciesbull Greater overall radio system flexibility

includingChannel (Talk Group) capabilitiesVarious user features including Emergency

Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit

bull Brings radio users together on a common radio system

bull Consistency in radio coverage

16

So How Does It Work

17

Control Channel continuously transmits system data to all radios PD

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FDEMS

18

Radio user presses TX button and radio information is sent via control channel to

Central Controller

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

19

Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios

selected on same Talk Group

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

20

Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the

voice transmission

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

21

When transmission is completed all units revert back to Control Channel

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

12

Conventional vs Trunked

Trunked Radio (repeater) systembull The entire system is managed by a computer

often referred to as the ldquoCentral Controllerrdquobull All radios in the system also are computer-

controlled and communicate to the central controller via one frequency known as the ldquoControl Channelrdquo

13

EMS

1 to 28 Channels

CH 1

CentralController

TX RX

CH 2

RXTX

CH 3

RXTX

CH 4

RXTX

CH 28

RXTX

ControlChannel

PD

Basic Trunking Diagram

FD

14

Your Bank Tellers ndash as ldquoTrunkedrdquo

Director CH 5CH 3 CH 4CH 2

EMS FD

PD

PD

Queueby

FirstAvailable

Teller

FD

IN

15

Conventional vs Trunked

Trunked Radio Benefits bull Greatly improved usage of scarce radio

frequenciesbull Greater overall radio system flexibility

includingChannel (Talk Group) capabilitiesVarious user features including Emergency

Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit

bull Brings radio users together on a common radio system

bull Consistency in radio coverage

16

So How Does It Work

17

Control Channel continuously transmits system data to all radios PD

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FDEMS

18

Radio user presses TX button and radio information is sent via control channel to

Central Controller

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

19

Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios

selected on same Talk Group

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

20

Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the

voice transmission

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

21

When transmission is completed all units revert back to Control Channel

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

13

EMS

1 to 28 Channels

CH 1

CentralController

TX RX

CH 2

RXTX

CH 3

RXTX

CH 4

RXTX

CH 28

RXTX

ControlChannel

PD

Basic Trunking Diagram

FD

14

Your Bank Tellers ndash as ldquoTrunkedrdquo

Director CH 5CH 3 CH 4CH 2

EMS FD

PD

PD

Queueby

FirstAvailable

Teller

FD

IN

15

Conventional vs Trunked

Trunked Radio Benefits bull Greatly improved usage of scarce radio

frequenciesbull Greater overall radio system flexibility

includingChannel (Talk Group) capabilitiesVarious user features including Emergency

Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit

bull Brings radio users together on a common radio system

bull Consistency in radio coverage

16

So How Does It Work

17

Control Channel continuously transmits system data to all radios PD

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FDEMS

18

Radio user presses TX button and radio information is sent via control channel to

Central Controller

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

19

Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios

selected on same Talk Group

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

20

Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the

voice transmission

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

21

When transmission is completed all units revert back to Control Channel

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

14

Your Bank Tellers ndash as ldquoTrunkedrdquo

Director CH 5CH 3 CH 4CH 2

EMS FD

PD

PD

Queueby

FirstAvailable

Teller

FD

IN

15

Conventional vs Trunked

Trunked Radio Benefits bull Greatly improved usage of scarce radio

frequenciesbull Greater overall radio system flexibility

includingChannel (Talk Group) capabilitiesVarious user features including Emergency

Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit

bull Brings radio users together on a common radio system

bull Consistency in radio coverage

16

So How Does It Work

17

Control Channel continuously transmits system data to all radios PD

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FDEMS

18

Radio user presses TX button and radio information is sent via control channel to

Central Controller

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

19

Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios

selected on same Talk Group

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

20

Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the

voice transmission

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

21

When transmission is completed all units revert back to Control Channel

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

15

Conventional vs Trunked

Trunked Radio Benefits bull Greatly improved usage of scarce radio

frequenciesbull Greater overall radio system flexibility

includingChannel (Talk Group) capabilitiesVarious user features including Emergency

Alarm PTT ID Channel Regrouping Call Alert and Radio Inhibit

bull Brings radio users together on a common radio system

bull Consistency in radio coverage

16

So How Does It Work

17

Control Channel continuously transmits system data to all radios PD

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FDEMS

18

Radio user presses TX button and radio information is sent via control channel to

Central Controller

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

19

Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios

selected on same Talk Group

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

20

Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the

voice transmission

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

21

When transmission is completed all units revert back to Control Channel

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

16

So How Does It Work

17

Control Channel continuously transmits system data to all radios PD

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FDEMS

18

Radio user presses TX button and radio information is sent via control channel to

Central Controller

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

19

Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios

selected on same Talk Group

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

20

Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the

voice transmission

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

21

When transmission is completed all units revert back to Control Channel

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

17

Control Channel continuously transmits system data to all radios PD

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FDEMS

18

Radio user presses TX button and radio information is sent via control channel to

Central Controller

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

19

Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios

selected on same Talk Group

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

20

Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the

voice transmission

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

21

When transmission is completed all units revert back to Control Channel

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

18

Radio user presses TX button and radio information is sent via control channel to

Central Controller

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

19

Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios

selected on same Talk Group

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

20

Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the

voice transmission

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

21

When transmission is completed all units revert back to Control Channel

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

19

Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios

selected on same Talk Group

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

20

Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the

voice transmission

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

21

When transmission is completed all units revert back to Control Channel

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

20

Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the

voice transmission

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

21

When transmission is completed all units revert back to Control Channel

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

21

When transmission is completed all units revert back to Control Channel

CH 1

CentralController

TX RX

CH 2RXTX

CH 3RXTX

CH 4RXTX

CH 28RXTX

ControlChannel

FD

FD

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

22

Radio System Fleetmapping

Radio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo

(Law Enforcement shown here)

1 Itasca Co Law 1 IT Law 1 Y Y 1 22 Itasca Co Law 2 IT Law 2 Y Y 2 23 Itasca Co Law 3 IT Law 3 Y Y 1 34 Itasca Co Law Tac IT Law Tac Y Y 2 35 Itasca Co SO Admin IT SO Adm Y N 1 36 Itasca Co Srch amp Res IT S-R Y N 2 37 Itasca Co Probation IT Prob Y N 1 38 Itasca Co SO Jail IT SO Jail N na na9 Grand Rapids PD GR PD Ops Y Y 2 210 Drug Task Force IT DTF Y N11 Emer Response Team IT ERT Y N

12 Law Scene of Action SOA P1 N N na na

13 Grand Rapids PD Admin GR PD Adm Y N 1 414 Bigfork Police Admin BF PD Adm Y N 2 415 Bovey Police Admin BV PD Adm Y N 1 416 Coleraine Police Admin CL PD Adm Y N 2 417 Deer River Police Admin DR PD Adm Y N 1 418 Keewatin Police Admin KW PD Adm Y N 2 419 Nashwauk Police Admin NW PD Adm Y N 1 4

Talk

grou

p Na

me

Talk

grou

p Al

ias

(ABB

R)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talk

grou

p Pr

iorit

y

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

23

Fire amp EMS Talk Groups

Talkg

roup

Na

me

Talkg

roup

Alia

s (A

BBR)

Trun

ked

Disp

atch

Fails

oft

Chan

nel

Talkg

roup

Pr

iority

Itasca Co Fire 1 IT Fire 1 Y Y 3 2Itasca Co Fire 2 IT Fire 2 Y Y 4 2Itasca Co Fire 3 IT Fire 3 Y Y 3 3

Itasca Co Fire Tac IT Fire Tac Y Y 4 4

FireEMS Scene of Action SOAFIRE1 N N na na

Balsam Fire Admin BS FD Adm Y N 3 4Bigfork Fire Admin BF FD Adm Y N 4 4Bovey Fire Admin BV FD Adm Y N 3 4

Calumet Fire Admin CA FD Adm Y N 3 4Cohasset Fire Admin CH FD Adm Y N 4 4Coleraine Fire Admin CL FD Adm Y N 3 4Deer River Fire Admin DR FD Adm Y N 4 4Goodland Fire Admin GL FD Adm Y N 3 4

Grand Rapids Fire Admin GR FD Adm Y N 4 4Keewatin Fire Admin KW FD Adm Y N 3 4Marble Fire Admin MB FD Adm Y N 4 4

Nashwauk Fire Admin NW FD Adm Y N 3 4Squaw Lake Fire Admin SQ FD Adm Y N 4 4

Taconite Fire Admin TC FD Adm Y N 3 4WarbaFeelySago Fire Admin WFS FD Adm Y N 4 4

Fire VHF Mu Aid FD Muaid Y Y 3 3Itasca Co EMS 1 IT EMS (AMB) 1 Y Y 5 2Itasca Co EMS 2 IT EMS (AMB) 2 Y Y 6 2

Itasca Co EMS Tac IT EMS (AMB) Tac Y Y 3

FireEMS Scene of Action SOAFIRE2 N N na na

Bigfork Ambulance Admin BF AMB Adm Y N 5Buck Lake 1st Responders BL 1st AdmDeer River Ambulance Admin DR AMB Adm Y N 6

Meds1 Ambulance Admin M1 AMB Adm Y N 5Naswauk Ambulance Admin NW AMB Adm

Squaw Lake 1st Resp Admin SQ 1st Adm Y N 6

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

Main Map

ampCampArialBoldamp12Itasca County Fleet Map - Draft

ampLRev 5-7-07

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Law

1

Itasca Co Law 1

IT Law 1

Y

Y

1

2

2

Itasca Co Law 2

IT Law 2

Y

Y

2

2

3

Itasca Co Law 3

IT Law 3

Y

Y

1

3

4

Itasca Co Law Tac

IT Law Tac

Y

Y

2

3

5

Itasca Co SO Admin

IT SO Adm

Y

N

1

3

6

Itasca Co Srch amp Res

IT S-R

Y

N

2

3

7

Itasca Co Probation

IT Prob

Y

N

1

3

8

Itasca Co SO Jail

IT SO Jail

N

na

na

New 800 Simplex

9

Grand Rapids PD

GR PD Ops

Y

Y

2

2

10

Drug Task Force

IT DTF

Y

N

11

Emer Response Team

IT ERT

Y

N

12

Law Scene of Action

SOA P1

N

N

na

na

868950 MhzARMER Standard

Law Adm

13

Grand Rapids PD Admin

GR PD Adm

Y

N

1

4

14

Bigfork Police Admin

BF PD Adm

Y

N

2

4

15

Bovey Police Admin

BV PD Adm

Y

N

1

4

16

Coleraine Police Admin

CL PD Adm

Y

N

2

4

17

Deer River Police Admin

DR PD Adm

Y

N

1

4

18

Keewatin Police Admin

KW PD Adm

Y

N

2

4

19

Nashwauk Police Admin

NW PD Adm

Y

N

1

4

Fire

1

Itasca Co Fire 1

IT Fire 1

Y

Y

3

2

2

Itasca Co Fire 2

IT Fire 2

Y

Y

4

2

3

Itasca Co Fire 3

IT Fire 3

Y

Y

3

3

4

Itasca Co Fire Tac

IT Fire Tac

Y

Y

4

4

5

FireEMS Scene of Action

SOAFIRE1

N

N

na

na

868975 MhzARMER Standard

Fire

6

Balsam Fire Admin

BS FD Adm

Y

N

3

4

7

Bigfork Fire Admin

BF FD Adm

Y

N

4

4

8

Bovey Fire Admin

BV FD Adm

Y

N

3

4

9

Calumet Fire Admin

CA FD Adm

Y

N

3

4

10

Cohasset Fire Admin

CH FD Adm

Y

N

4

4

11

Coleraine Fire Admin

CL FD Adm

Y

N

3

4

12

Deer River Fire Admin

DR FD Adm

Y

N

4

4

13

Goodland Fire Admin

GL FD Adm

Y

N

3

4

14

Grand Rapids Fire Admin

GR FD Adm

Y

N

4

4

15

Keewatin Fire Admin

KW FD Adm

Y

N

3

4

16

Marble Fire Admin

MB FD Adm

Y

N

4

4

17

Nashwauk Fire Admin

NW FD Adm

Y

N

3

4

18

Squaw Lake Fire Admin

SQ FD Adm

Y

N

4

4

19

Taconite Fire Admin

TC FD Adm

Y

N

3

4

20

WarbaFeelySago Fire Admin

WFS FD Adm

Y

N

4

4

21

Fire VHF Mu Aid

FD Muaid

Y

Y

3

3

TBD

EMS

1

Itasca Co EMS 1

IT EMS (AMB) 1

Y

Y

5

2

2

Itasca Co EMS 2

IT EMS (AMB) 2

Y

Y

6

2

3

Itasca Co EMS Tac

IT EMS (AMB) Tac

Y

Y

3

4

FireEMS Scene of Action

SOAFIRE2

N

N

na

na

8689875 MhzARMER Standard

EMS

5

Bigfork Ambulance Admin

BF AMB Adm

Y

N

5

6

Buck Lake 1st Responders

BL 1st Adm

7

Deer River Ambulance Admin

DR AMB Adm

Y

N

6

8

Meds1 Ambulance Admin

M1 AMB Adm

Y

N

5

9

Naswauk Ambulance Admin

NW AMB Adm

10

Squaw Lake 1st Resp Admin

SQ 1st Adm

Y

N

6

Talkgroup ID (HEX)

Talkgroup ID (DEC)

Announcement group Name

Talkgroup Name

Talkgroup Alias (ABBR)

Trunked

Dispatch

Failsoft Channel Number

Talkgroup Priority

Comments

Interop

1

Itasca Co VHF Interop 1

IT VHF 1

Y

Y

Old VHF Repeater Channel

2

Itasca Co VHF Interop 2

IT VHF 2

Y

Y

Old VHF Repeater Channel

3

MINSEF VHF Interop

MINSEF

Y

Y

155475 Mhz

4

State Fire VHF Interop

Fire VHF

Y

Y

154295 Mhz

5

State Ambulance VHF Interop

EMS VHF

Y

Y

155340 Mhz

6

Itasca Co Event 1

IT Event 1

Y

Y

7

Itasca Co Event 2

IT Event 2

Y

Y

8

Future Regional Interop 1

A-TAC1 Z5

Y

All System Users

9

Future Regional Interop 2

A-TAC2 Z5

Y

All System Users

10

Future Regional Interop 3

A-TAC3 Z5

Y

All System Users

11

Future Regional Interop 4

A-TAC4 Z5

Y

All System Users

12

Future Regional Interop 1

P-TAC1 Z5

Y

Public Safety Users Only

13

Future Regional Interop 2

P-TAC2 Z5

Y

Public Safety Users Only

14

Future Regional Interop 3

P-TAC3 Z5

Y

Public Safety Users Only

15

Future Regional Interop 4

P-TAC4 Z5

Y

Public Safety Users Only

16

Aitkin Co VHF Interop

Aitk VHF

Y

Y

VHF RF Control Station

17

Beltrami Co VHF Interop

Belt VHF

Y

Y

VHF RF Control Station

18

Cass Co VHF Interop

Cass VHF

Y

Y

VHF RF Control Station

19

Hibbing PD VHF Interop

Hib VHF

Y

VHF RF Control Station

20

Koochiching Co VHF Interop

KoochVHF

Y

Y

VHF RF Control Station

21

St Louis Co VHF Interop

SLCo VHF

Y

Y

VHF RF Control Station

22

NPSPAC Hailing Mutual Aid

ICALL-MA

N

Y

Conventional 800 Mhz

23

NPSPAC TAC 1 Mutual Aid

ITAC1-MA

N

Y

Conventional 800 Mhz

24

NPSPAC TAC 2 Mutual Aid

NA

NA

NA

Not in System

25

NPSPAC TAC 3 Mutual Aid

NA

NA

NA

Not in System

26

NPSPAC TAC 4 Mutual Aid

NA

NA

NA

Not in System

27

Regroup

Dyn Rgrp

Y

Y

Co Ops

1

Itasca Co Highway Ops

IT Hwy 1

Y

Y

4

2

Itasca Co Highway Tac

IT Hwy 2

Y

N

4

3

Itasca Co Land Dept

IT Land

Y

N

4

4

Itasca Co Assessor

IT Assr

Y

N

4

City Ops

1

Cohasset Public Works

CH PW

Y

N

4

2

Deer River Public Works

DR PW

Y

N

4

3

Grand Rapids Public Works

GR PW

Y

N

4

Future Expansion

Future 1

Y

TBDFuture

Future Expansion

Future 2

Y

TBDFuture

Future Expansion

Future 3

Y

TBDFuture

Future Expansion

Future 4

Y

TBDFuture

24

Questionshellipso far

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

25

Simulcast Transmitting Systems

Simulcast Transmitting is defined as bull A radio system where the same radio

frequencies are Simultaneously Broadcast from all tower sites within the radio system

bull This allows same radio frequencies to be used throughout the entire coverage area

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

26

Simulcast Transmitting Systems

Simulcast Benefitsbull Seamless communications throughout the radio

systemrsquos coverage areabull Improved radio frequency utilizationbull Improved coverage in areas with difficult

terrainbull Improved in-building coverage (signals in

overlap zones are ldquoadditiverdquo)

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

27

Simulcast Transmitting Systems

Simulcast ldquoconsrdquo bull Not inexpensive technologybull Tower site spacing is critical (especially when

using NPSPAC frequencies)bull Signal ldquotimingrdquo is critical between all sitesbull Tower site interconnection (microwave T1

etc) is also critical and can be expensive

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

28

Simulcast Transmitting Systems

Site 1Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

29

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5

Kandiyohi Co MN ndash with Simulcast

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

30

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

31

ldquoSimulcastrdquo fills in where single site canrsquot

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

32

Simulcast Issues

bull Amplitude and frequency of transmitted signals must be very accurately timed to ensure good signal quality

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

33

Simulcast Issues

bull Slightly out of phase -ldquoGhostingrdquo on a TV set

bull Out-of-phase signals can cause destructive cancellation

bull Fully in-phase signals produce constructive composite signal

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

34

Discussion and questions regarding Simulcast transmission

techniques and issues

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

35

Multicast Transmitting Systems

Multicast Transmitting is defined as bull A radio system where different radio

frequencies are used at each tower site within the radio system

Multicast Benefitsbull Reduced system complexitybull Minimized site spacing issuesbull Lower system overall system cost

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

36

Multicast Transmitting Systems

Multicast ldquoconsrdquo bull Very high frequency usage (each site needs its

own set of frequencies)bull No Simulcast coverage benefits (overlap

voting)bull Units ldquoroamrdquo between sites

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

37

f1 f2 f3 f4 f5

f6 f7 f8 f9 f10

Kandiyohi Co MN ndash with Multicast

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

38

ARMER System

In the ARMER system each tower site is connected back to Zone Controller via microwave or other network link

Typical ARMER tower site is Multicast Typical Local Ehancement system is

Simulcast

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

39

Zone Controller

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

40

Radio System Modulation Technologies

bull Analog vs DigitalMost existing Public Safety radio

systems are analogNew 800 Mhz system are digitalSo whatrsquos the difference Is digital better and why

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

41

Modulation Techniques

Analog transmission

Digital transmission

Information is sent by changing the frequency amplitude or phase of the radio signal

Information is converted to true data bits and applied directly to the radio transmitter using FDMA (or TDMA or CDMA)

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

42

Modulation Techniques

bull Digital Benefits Clearer audio throughout system coverage

area

Improved radio frequency efficiency

Improved system coverage

Imbedded signaling options

Encryption with no range loss

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

43

Voting Receiver Technology

In a multi-tower site radio system a mobile or portable radio transmitting within the systemrsquos range has a good probability of being heard by more than one tower site

In a Voting receiver system the same-frequency receivers of the trunked repeater stations are connected together back to a main sitehellip

hellipwhere ndash in a digital system ndash all received signals from one ldquochannelrdquo are combined (added) together and used to create a the final received producthellip

hellipwhich may be stronger than the original signal

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

44

Voting Receiver Systems

Site 1

Site 2

Site 3

f1 f2 f3 f4 f5

f1 f2 f3 f4 f5f1 f2 f3 f4 f5

Comparator

Received audio to System

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions

45

Discussionamp

Questions

• Slide Number 1
• Presentation Agenda
• ldquoTrunking 101rdquo
• What is ldquoTrunkingrdquo
• Conventional vs Trunked
• Slide Number 6
• Slide Number 7
• Your Bank Tellers ndash as ldquoConventionalrdquo
• Conventional vs Trunked
• Trunked Radio Systems
• Conventional vs Trunked
• Conventional vs Trunked
• Basic Trunking Diagram
• Your Bank Tellers ndash as ldquoTrunkedrdquo
• Conventional vs Trunked
• So How Does It Work
• Control Channel continuously transmits system data to all radios
• Radio user presses TX button and radio information is sent via control channel to Central Controller
• Central Controller processes inbound request and sends repeater channel command (CH 3) back to all radios selected on same Talk Group
• Originating radio userrsquos radio automatically switches to correct voice channel and begins transmitting All radios selected on same Talk Group do the same and hear the voice transmission
• When transmission is completed all units revert back to Control Channel
• Radio System FleetmappingRadio ldquochannelsrdquo are now called ldquoTalk Groupsrdquo(Law Enforcement shown here)
• Fire amp EMS Talk Groups
• Questionshellipso far
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Simulcast Transmitting Systems
• Kandiyohi Co MN ndash with Simulcast
• Slide Number 31
• Simulcast Issues
• Simulcast Issues
• Discussion and questions regarding Simulcast transmission techniques and issues
• Multicast Transmitting Systems
• Multicast Transmitting Systems
• Kandiyohi Co MN ndash with Multicast
• ARMER System
• Slide Number 39
• Radio System Modulation Technologies
• Modulation Techniques
• Modulation Techniques
• Voting Receiver Technology
• Voting Receiver Systems
• DiscussionampQuestions