WHAT IS YOUR PLAN?

Site Trunking

Affiliation

Each radio can only be affiliated with one site at a time.

Each radio can only be affiliated with one talkgroup at a time.

Information is periodically verified and updated as any one of the three parameters changes.

Wide Area

What is Site Trunking?

Sites (towers) are networked to the system and other sites via a T-1 line (wide-area

operation).Site Trunking occurs when a site looses that T-1 connectivity to the network and to other

sites.

Capable radios will see SITE TRUNKING displayed.

In site trunking, a site will continue to trunk on channels at that site. Users affiliated with that site can continue to communicate with other users affiliated with that site only

and not with users affiliated with any other site.

User affiliated with other, networked sites also cannot communicate with users affiliated with

the site(s) that are in Site Trunking.

Site Trunking Myths

The Site is Down •SITE TRUNKING is not an indication that the system or a given site is “down” or “off the air”.

. Report Site Trunking •Users/agencies do not need to report the SITE TRUNKING problem to either IPSC or Motorola

T-1 Line are controlled by IPSC •IPSC does not control the T-1 lines.

SITE TRUNKING and the Dispatcher

Wire Line consoles -hooked directly into the system via T-1 telephone line

connections to a Zone Controller.

It is recommended that Wire Line

console users have at least one radio in their dispatch center to monitor

local site conditions.

A dispatcher utilizing a Wire

Line console will have no indication from their console that one or more sites in their area

is in SITE TRUNKING.

SITE TRUNKING and the Dispatcher

The radio(s) is within hearing distance and the SITE TRUNKING alert tones are turned on in that radio(s).

 SITE TRUNKING and the Field Units

Depending on your normal jurisdictional, you may

want to consider having your radios programmed with a SITE LOCK button.

may hear a periodic audible

indicator (if the alarm is turned

on in the radio).

Radios that are

affiliated with a site that goes into SITE

TRUNKING may receive

a:

visual indication on

the radio screen (if so equipped).

Your SITE TRUNKING plan.

Note: Even with a stand-alone radio in the dispatch center however, you still may not be aware of a site being in SITE TRUNKING if that site is some distance from your location.

Have at least one (1) portable or mobile radio as a backup to your console and as an indicator of SITE TRUNKING conditions at a site in your immediate area.

Wire Line console

Your SITE TRUNKING plan

RF console Have at least two (2) radios on separate external antennas,

pointed toward different sites.

Create a temporary console patch between

both the Wide Area and the SITE

TRUNKING sides of the conversations.

Available resources may also allow the

dispatcher to SimulSelect both

radios to dispatch to both Wide Area and

SITE TRUNKING sides of the conversations.

Developed policies within the agency to move users to the designated talkgroup(s) for the duration of the SITE TRUNKING

event.

How IPSC Can Help.

IPSC can help determine the site which provides the best overall coverage within the designated agency’s service area, and

IPSC can apply a profile to one or more of the agency talkgroup(s) that will make those talkgroups only active on the site designated.

Training

IPSC has the ability to remotely place a site into SITE TRUNKING for testing and exercises.

A IPSC staff member will be available to assist you and your staff in understand SITE TRUNKING, developing a plan and

training your personnel.

Users must be trained on how to recognize and respond to SITE TRUNKING according to a predetermined plan.

For Assistance

Vivian Nowaczewski- Training Director

vnowaczewski@ipsc.in.gov(317)899-8534

IPSC Network Operations Center (NOC)

nocipsc@ipsc.in.gov317-234-1540