2.OMD101010 BSC6000 Hardware Structure ISSUE1.0

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BSC6000 Hardware Structure

ForewordThis course describes the hardware structure of the

HUAWEI BSC6000 system, board module functions, system

operating principles, system signal flows, and O&M flows. In

addition, this course describes the principles of hardware

configuration and lists some typical configurations

ReferencesHUAWEI BSC6000 Hardware Reference

HUAWEI BSC6000 System Description

HUAWEI BSC6000 Architecture and Principles

ObjectivesUpon completion of this course, you will be able to:

Understand HUAWEI BSC6000 function and features

Master HUAWEI BSC6000 hardware structure

Understand HUAWEI BSC6000 system principle

Master HUAWEI BSC6000 typical configuration

Contents1. System Description

2. Hardware Structure

3. System Logical Structure

4. System Signal Flow

5. Typical Configuration

Location of the BSC6000The HUAWEI BSC6000 is a new generation GSM BSC

product after the HUAWEI BSC32 (previous BSC)

BSC6000

MS BTS

PCU6000

Um PDN

Features of the BSC6000 System Large capacity, high integration

Supporting 2048TRX at the full rate; supporting

2048TRX at the half rate

Maximum of traffic: 12,000 Erl; BHCA : 2,340,000

In case of using the E1 interface board, the maximum

of the system is four cabinets

In case of using the STM-1 interface board, the

maximum of the system is three cabinets

Features of the BSC6000 System Low cost, low power consumption

256TRX power consumption( including GTCS)1640W (A interface in E1 mode)

1570W (A interface in STM-1 mode)

2048TRX power consumption( including GTCS)6920W (A interface in E1 mode)

5620W (A interface in STM-1 mode)

Flexible configuration Supporting multiple types of networking between BSC and BTS

Multiple clock sources

Features of the BSC6000 System Advanced management algorithm for radio resource

HW_II Power Control Algorithm

HW_II Handover Algorithm: supporting about 10 handover

algorithms, such as hierarchical handover, layer handover, and

PBGT handover

Multiple radio resource allocation technology and flexible radio

channel switch mechanism

Features of the BSC6000 System Smooth capacity expansion and upgrade

Supporting smooth, in-service capacity expansion

Supporting in-service patching

Strong performance, advanced design

Supporting 2M signaling link

Supporting local multiple signaling points (at most 4)

Supporting TC resource pool

Supporting full-index report performance statistics

Contents2. Hardware Structure

2.1 Rack

2.2 Subrack

2.3 Board

Structure of RackModel: Huawei N68-22 cabinet

Dimension: 600mm (width) x800mm (depth) x

2200mm (height)

Weight: 150 kgs of Empty cabinet; 350 kgs of

full configuration

BSC6000 rack type

GBCR: GSM BSC Control Processing Rack

GBSR: GSM BSC Service Processing Rack

GBCRGBCR (GSM BSC Control Processing Rack ) must be configured with

GMPS (GSM main processing subrack)

GBAM (GSM Back Administration Module)

GIMS( GSM Integrated Management System )

One KVM (keyboard, video and mouse)

One LAN Switch

One GBAM (GSM Back Administration Module) server

LAN Switch

Power distribution

Subrack

Air defencesubrack

Cabling subrack

GBSRGBSR (GSM BSC Service

Processing Rack ): It is only

configured with subracks

One service rack can be

configured with three subracks

at most according to the

requirement

Subrack

GBAMThe GBAM is a server installed with Linux system and OMU

software, which is used to perform operation and

maintenance for the BSC6000

Controls the communications between the LMT and boards

Processes commands from the LMT

Filters the results from boards and then returns the results to the

GBAM Module Port

Display port

RJ45 NIC RJ45 NIC port RJ45 Serial port

RJ45 NIC 10M/100M adaptive Ethernet port

Port for the mouse and keyboard

DC input power socket Grounding screw

Power button CD-ROM

KVMThe KVM is a device integrating a

keyboard, a monitor, and a mouse.

It is the operating platform of the

DC input power socket

Power switch

Port for display cable Port for keyboard cable Port for mouse cable

Fan Box PFCU (Fan Control Unit)

Monitors the running status of the fans in the fan box

Reports the working status of the fan box to GSCU

Detects the temperature of the fan box with a temperature sensor

Shows the current status of fan box and alarms through LED

PFPU (Fan Power Unit)

provides power supply for nine fans

keeps the voltage stable

Power Distribution Box Checks two channels of - 48 V input voltage

Detects one route of external temperature sensor; detects one route

of external humidity sensor; detects two lightning protection

components; detects the status of six distributed-power output

switches

Reports the status of the power distribution box and exchanges

O&M information with the GSCU

Emits audio and visual alarms

SubrackThe width of subrack is 19

inches

A backplane is in the middle of

the subrack, and boards are

inserted from the front and the

rear of the subrack

Both the front subrack and the

rear subrack provide 14 slots

Numbered as 00 --13 from left to

right at the front

Numbered as 14--27 from right

to left at the back

Fan box

Cabling Trough

Front of subrack Rear of subrack

Subrack

GMPS/GEPSGMPS/GEPS GTCSGTCSBTSBTS

CBCCBCPCUPCU

MSCMSC

BMBM TCTC

AbisAbis AterAter AA

PbPb CbCb

GBAMGBAM

LMTLMT

Abbreviation

Abbreviation Full Name GBAM GSM Back Administration ModuleGEPS GSM Extended Processing SubrackGMPS GSM Main Processing SubrackGTCS GSM TransCoder SubrackLMT Local Maintenance Terminal

GMPSConfigured in the controlling cabinet (GBCR)Performs the basic service processing Performs operation maintenance functionsProvides system clock—With GGCU Processes a maximum of 512 TRXs in full configuration

1300 01 02 03 07060504 08 09 10 1211

2714 15 16 17 21201918 22 23 24 2625

Rear board

Front board

Backplane

Different Different from from GEPSGEPS

Front boardThe GXPUM Slot 0-1

The GTNU Slot 4-5

The GSCU Slot 6-7

The GGCU Slot 12-13

The GEIUB Slot 18-27

The GEIUT Slot 16-17

The GEIUP Slot 14-15

Real board

GEPSPerforms basic service processing

0 ~3 GEPSs can be configured in GBCR or GBSR

Processes a maximum of 512 TRXs in full configuration

1300 01 02 03 07060504 08 09 10 1211

2714 15 16 17 21201918 22 23 24 2625

Rear board

Front board

Backplane

Front boardThe GXPUM Slot 0-1

The GTNU Slot 4-5

The GSCU Slot 6-7

The GEIUB Slot 18-27

The GEIUP Slot 14-15

Real board

GTCS-E1 TransmissionPerforms transcoding, rate adaptation and sub-multiplexing

Provides a maximum of 3,840 speech channels when A

interface adopts E1 transmission

1300 01 02 03 07060504 08 09 10 1211

2714 15 16 17 21201918 22 23 24 2625

Rear board

Front board

Backplane

GTCS-Optical TransmissionPerforms transcoding, rate adaptation and sub-multiplexing

Provides a maximum of 7,680 speech channels when A

interface adopts STM-1 transmission

1300 01 02 03 07060504 08 09 10 1211

2714 15 16 17 21201918 22 23 24 2625

Rear board

Front board

Backplane

Front board

The GDPUC Slot 9-13

The GTNU Slot 4-5

The GSCU Slot 6-7

The GEIUA Slot 18-27

Real board

Abbreviation Abbreviation Full name GGCU GSM General Clock UnitGSCU GSM GE switching Network UnitGTNU GSM TDM Switching UnitGXPUC GSM Extended Processing Unit for Cell broadcast

serviceGXPUM GSM Extended Processing Unit for Main serviceGDPUC GSM Data Processing Unit for CS serviceGEIUA GSM E1/T1 Interface Unit for AGEIUB GSM E1/T1 Interface Unit for AbisGEIUP GSM E1/T1 Interface Unit for PbGEIUT GSM E1/T1 Interface Unit for AterGOIUA GSM Optic Interface Unit for AGOIUB GSM Optic Interface Unit for AbisGOIUP GSM Optic Interface Unit for PbGOIUT GSM Optic Interface Unit for Ater

Board- GGCUConfigured in slots 12 and 13 in the GMPS (active/standby mode)

provides synchronous timing signals for the system

Generates synchronous clock signals

Keeps the consistency of synchronization information output from

the active and standby GGCUs

RUNALMACT

ATN-IN

Port Function Matching Connector

CLKOUT 0-9 Output 8 kHz clock signals to the GSCU RJ45 COM 0-1 Reserved RJ45

TESTOUT ReservedTESTIN Reserved

CLKIN 0-1 Synchronization clock signal input port, used to input one route of external 2.048 MHz signal and 2.048 Mbit/s code stream

signals

SMB male connector

Board- GSCUConfigured slots 6 and 7 of the GMPS/GEPS/GTCS (active/standby mode)

Performs maintenance management

Provides a GE platform for the subrack

Provides clock information for the other boards in the same subrackexcept the GGCU in the GMPS

Port Function Matching

Connector 10/100/1000

BASE-T 0–910/100/1000 Mbit/s Ethernet ports, used to connect

subracksRJ45 10/100/1000

BASE-T 10–1110/100/1000 Mbit/s Ethernet ports, used to connect GBAM

(Only the main subrack is connected with the GBAM)COM Debugging port

CLKIN Clock source port, used to receive the 8 kHz clock signals

from the panel of the GGCUTESTOUT Clock test signal port, used to output clock test signals SMB male

RUNALM

TESTOUT

ACTLINK

Board- GTNUConfigured in slots 4 and slot 5 of the GMPS/GEPS/GTCS

(active/standby mode)

Performs the TDM (Time Division Multiplexing) switching

function

Provides 128 K *128 K TDM switching

Allocates TDM network resources, establishes and releases

radio links

connector

TDM 0-5TDM high-speed serial port, used to connect

the GTNUs between subracksDB14

G T N U

P A R C

R U NA L M

Board- GXPUMConfigured in slots 0 and 1 of the GMPS/GEPS

(active/standby mode).

Paging control

System information management

Channel assignment

BTS common service management

G X P U

P A R C

R U NA L M

A C TL I N K

3 Port Function Matching

connector

10/100/1000

BASEs- T0-3GE/FE Ethernet port, reserved RJ45

Voice call control

Packet service control

Handover

Power control

Board- GXPUCConfigured in slots 10 and slot 11 in the GMPS/GEPS

(active/standby mode)

Performs message cell broadcast function of the system

Provides interface for connecting the Cell Broadcast Center

Stores cell broadcast messages

Schedules cell broadcast messages based on the Cell

Broadcast Channel (CBCH)

G X P U

P A R C

R U NA L M

A C TL I N K

connector

10/100/1000

BASEs T0-3GE/FE Ethernet port, reserved RJ45

Board- GEIU/ GOIUGEIU/GOIU works in active/standby mode and can be categorized into the following types :

The GEIUB/GOIUB is the Interface Unit for the Abis interfaceThe GEIUP/GOIUP is the Interface Unit for the Pb interfaceThe GEIUT/GOIUT is the Interface Unit for the Ater interfaceThe GEIUA/GOIUA is the Interface Unit for the A interface

RUNALMACT

E1/T1(0~7)

E1/T1(16~23)

E1/T1(24~31)

E1/T1(8~15)

Interface Function Matching connector

E1/ T1

0-31The E1/ T1 port,0 ~31 of the used to transmit and receive E1/ T1 signals on routes 0-31

2M 0-12.048 MHz clock source output port, used to output the extracted line clock as the system clock source

SMB male connector

TESTOUT 2.048 MHz clock output port, used to output the testing clock of the system

SMB male connector

Board- GEIU/ GOIUThe GEIU/GOIU has the following functions:

Processes the SS7 MTP2 protocols (performed by GEIUT/GOIUT)

Processes the Link Access Procedure on the D channel (LAPD) protocols (performed by GEIUP/GOIUP or GEIUB/GOIUB )

Provides maintenance links when GTCS subracks are configured at the MSC side

Performs inter-board Tributary Protect Switching (TPS)

RUNALMACT

E1/T1(0~7)

E1/T1(16~23)

E1/T1(24~31)

E1/T1(8~15)

Interface Function Matching connector

RX Transmitting optical port 155.52 Mbit/s

TX Receiving optical port 155.52 Mbit/s

LC connector

2M 0-12.048 MHz clock source output port, used to output the extracted line clock as the system clock source

SMB male connector

TESTOUT 2.048 MHz clock output port, used to output the testing clock of the system

SMB male connector

Board- GEIU

DIP switch

Bit Description 75 Ω 120 Ω

1 0 -7 of the Used to select the impedance on E1/ T1 links 7

ON OFF

5-8 Unused ON OFFS3 1-8 0 -7 of the Used to set the protection grounding of

the transmitting end of E1/ T1 links 7ON OFF

S4 1-8 8 -15 of the Used to set the protection grounding of the transmitting end of E1/ T1 links 15

ON OFF

There are DIP switches on GEIU, the default setting is to support 75Ω

Board- GDPUCConfigured in slot 0 to slot 3, slot 8 to slot 13 of the

GTCS (N+1 redundant backup mode)

Performs the voice and data service processing function

Encodes and decodes speech services

Performs data service rate adaptation

Performs Tandem Free Operation (TFO)

Performs voice enhancement function

Automatically detects voice faults

G D S U

P A R C

R U NA L M

Contents3. System Logical Structure

3.1 TDM Switching Subsystem

3.2 GE Switching Subsystem

3.3 Service Processing Subsystem

3.4 Service Control Subsystem

3.5 Interface and Signaling Processing Subsystem

3.6 Clock Subsystem

System Logical StructureConnectionbetweensubracks

TDM switching subsystem

GE switching subsystem

Clocksubsystem

Serviceprocessingsubsystem

E1/STM-1 to BTSInterface

andsignaling

processingsubsystem

E1/STM-1 to PCU

E1/STM-1 to MSC

Servicecontrol

subsystem

Connectionbetweensubracks

TDM Switching Subsystem The Time Division Multiplexing (TDM) switching subsystem provides circuit

switched domain (CS) switching for the system

Provides TDM bearers for the A, Abis, Ater, and Pb interfaces

Performs TDM switching and providing circuit switched domain (CS) switching for the system

Provides TDM bearers for the system service processing

Logical Unit Physical entity

TDM access bearer unit GEIUB/GOIUB, GEIUP/GOIUP, GEIUT/GOIUT, GEIUA/GOIUA

TDM switching unit GTNU

TDM processing bearer unit GDPUC

TDM Access Bearer UnitThe TDM access bearer unit provides TDM bearers for the services on the A, Abis, Ater, and Pb interface. Each board has the same hardware structure that contains backplane and sub board. By loading software, the functions of A, Abis, Ater, and Pb interface can be enabled.

TDM Switching UnitIntra-Subrack TDM Switching

GTNU (active) GTNU (standby)

Board Board Board………Connection between a board and the active GTNU through a backplane TDM path

Connection between a board and the standby GTNU through a backplane TDM path

TDM Switching UnitInter-Subrack TDM switching

Inter-subrack TDM switching is carried out through mesh interconnections

The BSC6000 supports the following mesh interconnections between a maximum of four subracks

Mesh interconnections between the GMPS and three GEPSs

Mesh interconnection between four GTCSs

SubrackSubrack 11

SubrackSubrack 22

SubrackSubrack 44

SubrackSubrack 33

Inter-Subrack InterconnectionsThe right figure

shows the

interconnections of

GTNU crossover

cables when four

service subracks

are configuredGEPS 1#

GMPS 0#GTNU GTNU

GTNU GTNUGEPS 2#GTNU GTNU

GEPS 3#GTNU GTNU

GTNU Crossover Ethernet Cable

Pin1 Pin14

GE Switching SubsystemThe Gigabit Ethernet (GE) switching subsystem performs GE switching of signaling and O&M interface

The GSCU performs operation and maintenance of its subrackand provides GE switching for the other boards in the same subrack

GSCU (active) GSCU (standby)

Board Board Board………IntraIntra--SubrackSubrack ConnectionConnection

GE Switching UnitInter-subrack GE switching: star interconnection through

crossover networks

GEPSGEPS

GEPSGEPS GMPSGMPS

GEPSGEPS

GTCSGTCS

Only in Local Only in Local GTCS mode:GTCS mode:Crossed LAN Crossed LAN

cables between cables between GSCUGSCU

Note: In Remote GTCS mode, loading path is in Ater interface

Cross LAN cables

M2000/NM centerLanSwitch

GSCU (main subrack)

GE TRUNK1

GE TRUNK3

GE TRUNK4

GE TRUNK6

GE TRUNK5

GE TRUNK2

GE Switching Interconnection

CBCGE 0

GSCU (extension subrack)

(main subrack)

GSCU0 GSCU1

QuestionsWhat is the difference between the local GTCS and the remote GTCS?

The local GTCS connects with the GMPS through an Ethernet cable.Only the Ater connection path should be configured

The remote GTCS connects with the GMPS through E1 transmission. Ater connection path as well as the Ater OML and the Ater signaling link should be configured

When the Ethernet cable between the GTCS and the GMPS or GEPS is equal to or longer than 10 m, the remote GTCS should be configured

Service Processing SubsystemThe hardware entity of the service processing

subsystem is the GDPUC board

Transcoding

Rate adaptation

Every board can process 968

circuits in A interface

Works in resource pool mode

QuestionsIf one GDPUC board is faulty, Will multiple CICs become

unavailable?

No, because GDPUC works in rescues pool mode, other

boards can provide service

Service Control Subsystem

The hardware entities:

The GXPUM board

The GXPUC board

The GBAM server

The GSCU board in the GTCS subrack

Service Control SubsystemThe GXPUM board performs the main service processing of the BSC6000

paging control, system information management, channel assignment, and BTS common service management

voice call control, PS service control, handover, and power control

The GXPUC board performs the cell broadcast function

The GBAM server performs BTS O&M management

The GSCU board in the GTCS subrack performs the TC resource pool management

Interface and Signaling Processing Subsystem

The interface and signaling subsystem provides interfaces of BSC, BTS, and NSS, which performs signaling processing function of data link layer

Provides A/Abis/Pb/Ater interfaces

Supports cell broadcast message service processing

Supports the MTP2 protocol of SS7 processing

Supports the LAPD protocol processing

BTSGMPS/GEPS

GTCS MSC

PCU CBC

Signaling Processing

GEIUB/GOIUB processes the LAPD signaling in Abis interface,

which can support 256 LAPD links

GEIUT/GOIUT in GMPS/GEPS processes the MTP2 signaling

of SS7 ,every subrack supports 16 SS7 links which are 64Kbps

and 8 SS7 links which are 2Mbps

GEIUP/GOIUP processes the LAPD signaling in Pb interface,

every subrack supports 64 LAPD links

Traffic Processing

GEIUB/GOIUB supports 128 TRXs

GEIUT/GOIUT supports 3840 speech channels

GEIUP/GOIUP supports 3840 16Kbps PCICs

GEIUA supports 960 speech channels

GOIUA supports 1920 speech channels

Clock Subsystem Hardware entity is the GSM General Clock Unit (GGCU)

Clock sources

Building Integrated Timing Supply System (BITS)

2 MHz clock

2 Mbit/s clock

The 2 Mbit/s clock source has higher anti-interference capabilities than the 2 MHz clock source

Line clock

The GTCS extracts line clock from the A interface. The GEIUA in the GTCS processes the clock and generates 8 kHz

The GTCS sends the 8 kHz clock to the GGCU in the GMPS by the Ater interface

The GEIUA in the GTCS sends the 8 kHz clock to the GSCU by the backplane in the GTCS. The GSCU forwards the 8 kHz clock to the other boards in the GTCS

Local free-run clockthe R01 does not support this clock

Clock ConfigurationConfiguration for the clock in the GGCU

Without BITS

GGCU extracts the synchronization reference clock from the

interface board of GMPS

Other distribution cables are not required

GGCU chooses the clock reference of backplane

With BITS

GGCU should be equipped with distribution cables

BITS has high priority

Active/standby GGCU

in GMPS

Service

BITS Line Clock

Backplane transmission Distribution cable

transmission

Backplane transmission

System Clock Scheme

Service

Clock Synchronization Interconnection

GMPSGGCUGGCU

GEPSGSCU GSCU

Y-shaped cable ……

CLKIN CLKIN

GEPSGSCU GSCU

CLKIN CLKIN

……

Contents4. System Signal Flow

4.1 System Signal Flow

4.2 O&M Signal Flow

4.3 Loading Path

4.4 Alarm Channel

CS Service Signal Flow Voice service

BTS GEIUB GTNU GEIUT GEIUT GTNU

GDPUC GTNU GEIUA MSC

E1/T1 cable

TDM switching on the backplane

GTCSGMPS/GEPS A interface

Front board

Rear board

8K/16K 64K

PS Service Signal FlowPS service

BTS GEIUB GTNU GEIUP PCU

E1/T1 cable

Backplane TDM switching

GMPS/GEPS Pb Gb

Front board Rear board

Service Signal Flow

TC subrack

GEIUT GEIUA

BM subrack

GEIUTGEIUBGTNU

Voice service, non-crossover subrack switch Voice service, crossover subrack switch

PS service, non-crossover subrack switch

BM subrack

GEIUB GEIUT

16K 64K

64K64K

64K 64K 64K

64K16K

PS service, crossover subrack switch

TC subrack

GDPUC(TC)

GEIUT GEIUA

64K 64K 64K

A interface

SS7 on the A Interface SS7 on the A Interface

MSC GEIUA GTNU GEIUT GEIUT GSCU

The signals are processed through the MTP2, and then sent to the GXPUM in the mode of internal

signaling flow

GTCSGMPS/GEPS Ater A

E1/T1 cable

GE switching on the backplaneTDM switching on the backplane

Front board

Rear board

LAPD on the Abis InterfaceLAPD on the Abis interface

BTS GEIUB GSCU GXPUM

E1/T1 cable

GE switching on the backplane

The signals are processed through the LAPD, and then sent to the GXPUM in the mode of internal signaling flow

GMPS/GEPSAbis

Front board

Rear board

LAPD on the Pb InterfaceLAPD on the Pb interface

PCU GEIUP GSCU GXPUM

E1/T1 cable

The signals are processed through the LAPD, and then sent to the GXPUM in the mode of internal signaling flow

GMPS/GEPSPb

Front board

Rear board

Signaling Signal Flow on the CbInterface

Signal signaling flow on the Cb interface

CBC GBAM GSCU GXPUC GSCU GXPUM

Ethernet Cable

The signals are processed through the Cbinterface module, and then sent to service control subsystem in the mode of internal signaling flow

GMPS/GEPSCb

Front board

Rear board

LANSwitch

O&M Flow

Service board G

E1/T1 cable

Network cable

GTCSGMPS

Service board

HDLC link

Front board

Rear board

O&M Flow O&M path of the GMPS

LMT GBAM GSCU boards of the GMPS

O&M path of the GEPS

LMT GBAM GSCU inter- subrack interconnection cable GSCU boards of the GEPS

O&M path of the GTCS

LMT GBAM GSCU GEIUT HDLC GEIUT GSCU boards of the GTCS

O&M path of the BTS

LMT GBAM GSCU GEIUB BTS

Software Loading Path (Remote GTCS)

GEPS GTCS

Main GTCSGMPS

GE on the backplane

Inter-subrack Cable

Service board

Software Loading Path (Local GTCS)

GE on the backplane

Inter-subrack Cable

Service board

GEPS GTCS

Service board

Main GTCS

Service board

Connection of Alarm Box Connection scheme

Alarm management

module

GBAM Alarm box

Convert Management System

Serial CableSerial Cable

Report of Alarm from Local Subrack

GSCU GBAMLMT

Convert Alarm box

Service board

Generate/Generate/Shield Shield AlarmsAlarms

Report Report AlarmsAlarms

Send Send AlarmsAlarms

&Record &Record logslogs

Output Output Alarms Alarms &Drive &Drive

Alarm boxAlarm box

Generate Generate Sounds&LightsSounds&Lights

Report of Alarm from Remote Subrack

GBAMLMT

Convert Alarm box

Service board

HDLCHDLCLinkLink

Configuration PrincipleGMPS/GEPS configuration principle

GEIUB/GOIUB supports 128 TRXs, 256 LAPDs

GEIUB/GOIUB provides 32 E1 ports which can work in 1:1,

2:1,3:1,4:1 mode

Only one subrack can be installed with GEIUP/GOIUP and GXPUC,

usually GEIUP/GOIUP and GXPUC is installed in GMPS

Both E1 and Optical transmission can be configured in Pb, Abis

interface in the same subrack, but only single transmission mode can

be configured in Ater interface

Configuration PrincipleGTCS configuration principle

All the GTCSs in the same BSC can only be configured as one single mode which is local GTCS or remote GTCS

GDPUC can process 968 circuits which uses N+1 redundancy configuration. All the TC resources are shared in resource pool mode in one subrack

GEIUT/GOIUT supports 3840 speech channels, GEIUA supports 960 speech channels while GOIUA supports 1920 speech channels, so the proportion between the number of the Ater interface boards and that of the A interface boards is 1: 4 or 1:2

Both E1 and Optical transmission can be configured in A interface in the same subrack, but only single transmission mode can be configured in Ater interface

Typical Configuration Capacity of this

configuration:

256TRX full

rate/256TRX

half rate

Typical Configuration Capacity of full configuration: When a BSC6000 is fully

configured, it supports 2048TRX full rate/2048TRX half rate

QuestionsWhy should the capacity of the transmission board be

expanded from the middle to the sides?

Because there are lots of cables when the E1/T1 electrical

interface is used, the capacity of the transmission board should

be expanded from the middle to the sides to facilitate the

cabling.

SummaryIntroduce features and functions of BSC6000

Describe components and functions of racks, subracks and

boards in BSC6000

Describe functions of logical structure and cable

connections in every logical part

List configuration principles and typical configurations

Thank youwww.huawei.com

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