BSCe3

PE/TRD/CN/4273 14.00/EN April, 2003

BSC e3 and TCU e3 Local Maintenance

OML14 Course

Course #1596AEN

Copyright 2003Nortel Networks, All Rights Reserved

Printed in France

NORTEL NETWORKS CONFIDENTIAL:

The information contained in this document is the property of Nortel Networks. Except as specifically authorized in writing by Nortel Networks, the holder of this document shall keep the information contained

herein confidential and shall protect same in whole or in part from disclosure and dissemination to third parties and use for evaluation, operation and maintenance purposes only.

You may not reproduce, represent, or download through any means, the information contained herein in any way or in any form without prior written consent of Nortel Networks.

The following are trademarks of Nortel Networks Corporation: *NORTEL NETWORKS, the NORTEL NETWORKS corporate logo, the NORTEL Globemark, HOW THE WORLD SHARES IDEAS, UNIFIED

NETWORKS, BSC6000. GSM is a trademark of France Telecom.

All other brand and product names are trademarks or registered trademarks of their respective holders.

BSC e3/TCU e3 Local Maintenance

"Confidential information -- may not be copied or disclosed without permission".

PE/TRD/CN/4273 14.00/EN April, 2003 ii

Publication History

Version Date mm/dd/yy

Comments

PE/TRD/CN/4273

13.01/EN Mars 2001 Creation

13.02/EN July 2001 Updating of the section 7: BSC e3 and TCU e3 Troubleshooting (TML part)

14.00/EN April 2003 Update



PE/TRD/CN/4273 14.00/EN April, 2003 iii

OML14 Course

Introduction 1

BSC e3 and TCU e3 Architecture 2

BSC e3 and TCU e3 Board Description 3

Thermic, Energetic and Cabling Aspects 4

Hardware Features and Configuration 5

BSC e3 and TCU e3 Startup 6

BSC e3 and TCU e3 Troubleshooting 7

BSC e3 and TCU e3 Module Replacement 8

Glossary 9



PE/TRD/CN/4273 14.00/EN April, 2003 iv

Volume Composition

No. Title Reference Version/Edition

1 OML14 BSC e3 and TCU e3 Local Maintenance

PE/TRD/CN/4273 14.00/EN



PE/TRD/CN/4273 14.00/EN April, 2003 v

Course Presentation

This course covers the BSC e3 and TCU e3 local maintenance.

It describes how to use the TML e3 equipment to troubleshoot a BSC e3/TCU e3 on site.

It describes also fault finding and software upgrading.

Course Objectives Upon completion of this course, you will be able to:

Describe the architecture of the BSC e3 and TCU e3. Describe all board functions and interfaces. Use the TML e3 equipment to interpret events coming from the BSC e3 and TCU e3 to perform tests and upgrades.

Identify, with leds and panel displays, the faulty modules and replace them.

Prerequisites This course is designed for people who maintain the BSS on site (Operator Field Technicians, Supervisors). Before attending this course, you need to have a good understanding of the Telecommunication systems (hardware and software) or equivalent systems. This knowledge is provided by the following course:

SY1ven: GSM System and Products Overview.

Scope

This course applies to the BSC e3 and TCU e3 V14 version.



PE/TRD/CN/4273 14.00/EN April, 2003 vi

Table of Contents

COURSE NOTES CONTENTS

PUBLICATION HISTORY ii

OML14 COURSE iii

VOLUME COMPOSITION iv

COURSE INTRODUCTION v

TABLE OF CONTENTS vii

1. INTRODUCTION 1-1

GSM/GPRS/UMTS TRAINING CURRICULUM 1-2

BSS NORTEL TECHNICAL PUBLICATIONS 1-3

CONTENTS 1-4

OBJECTIVES 1-5

2. BSC E3 AND TCU E3 FUNCTIONAL ARCHITECTURE 2-1

OBJECTIVES 2-2

CONTENTS 2-3

BSS IN THE GSM NETWORK 2-4

BSS ARCHITECTURE 2-5

BSC E3 AND TCU E3 EXTERNAL LINKS 2-6

BSC E3 AND TCU E3 MIXED SYSTEM ARCHITECTURE 2-7

BSC E3 AND TCU E3 PRESENTATION 2-8

BSC E3 ARCHITECTURE 2-9

DESCRIPTION 2-9

FUNCTIONAL ARCHITECTURE 2-10

TCU E3 ARCHITECTURE 2-11

DESCRIPTION 2-11

FUNCTIONAL ARCHITECTURE OF A TRANSCODING NODE 2-12



PE/TRD/CN/4273 14.00/EN April, 2003 vii

3. BSC E3 AND TCU E3 BOARD DESCRIPTION 3-1

OBJECTIVES 3-2

CONTENTS 3-3

CONTROL NODE 3-5

ARCHITECTURE 3-6

HARDWARE MODULES 3-7

THE CN SLICES 3-8

TM FUNCTIONS 3-9

MEMORY MASS STORAGE 3-10

OMU 3-11

ATM-SW 3-12

TMU 3-13

MINIMAL CONFIGURATION FOR THE CN 3-14

INTERFACE NODE 3-15

ARCHITECTURE 3-16

BOARD LAYOUT 3-17

CEM 3-18

8K-RM 3-19

ATM-RM 3-20

LSA-RC 3-21

MINIMAL CONFIGURATION FOR THE IN 3-24

TRANSCODING NODE 3-25

ARCHITECTURE 3-26

BOARD LAYOUT 3-27

TRM 3-28

MINIMAL CONFIGURATION FOR THE TN 3-29



PE/TRD/CN/4273 14.00/EN April, 2003 viii

4. THERMIC, ENERGETIC AND CABLING ASPECTS. 4-1

OBJECTIVES 4-2

CONTENTS 4-3

POWER SUPPLY AND ALARMS SYSTEMS 4-4

PCIU MODULES 4-4

SIM MODULE 4-5

COOLING SYSTEM 4-6

LOCATION OF THE COOLING & FAN UNITS 4-6

COOLING & FAN UNITS 4-7

BSC E3/TCU E3 CABLING 4-8

SAI FRAME 4-8

BSC E3 OPTICAL FIBER CABLING 4-9

PCM CABLING BETWEEN SAI & LSA-RC 4-10

PCM CABLING: CONNECTION LAS-RC/CTU 4-11

PCM CABLING: CTU CONNECTIONS 4-12

OPTIONAL HUB 4-13

48 V DC & ALARMS CABLING 4-14

BSC E3 ALARM CABLING 4-15

TCU E3 ALARM CABLING 4-16

BSC E3/TCU E3 FUSES 4-17

5. HARDWARE FEATURES, CONFIGURATION & DIMENSIONING 5-1

OBJECTIVES 5-2

CONTENTS 5-3

HARDWARE FEATURES 5-4

MAIN CHA RACTERISTICS 5-4

FILLER MODULE 5-5

BSC E3 &TCU E3 CONFIGURATIONS 5-6

MIN & MAX CONFIGURATIONS 5-6

BSC E3 & TCU E3 TYPICAL CONFIGURATIONS 5-7

BSC E3 CONFIGURATION EXAMPLES 5-8



PE/TRD/CN/4273 14.00/EN April, 2003 ix

6. BSC E3/TCU E3 STARTUP 6-1

OBJECTIVES 6-2

CONTENTS 6-3

EQUIPMENT STARTUP 6-4

PRINCIPLE 6-4

LED DISPLAY 6-5

BSC STARTUP AT THE OMC-R 6-7

HOT STARTUP (MIB BUILT) 6-7

COLD STARTUP (MIB NOT BUILT) 6-8

CONTROL NODE STARTUP 6-9

MAIN PRINCIPLES 6-10

BOARD RECOVERY 6-11

SLICE RECOVERY 6-12

DEAD OFFICE RECOVERY 6-13

CN COMPLETE STARTUP SEQUENCE 6-14

CN STARTUP T IMER 6-15

INTERFACE NODE & TRANSCODING NODE STARTUP 6-17

IN STARTUP: PRINCIPLES 6-18

IN STARTUP: CEM/RM MODULES STATES 6-19

TN STARTUP 6-20

FAULT TOLERANCE 6-21

SOFTWARE 6-22

CELLGROUP CONCEPT 6.23

SWACT ON TMU FAILURE 6-24



PE/TRD/CN/4273 14.00/EN April, 2003 x

7. BSC E3 AND TCU E3 TROUBLESHOOTING 7-1

OBJECTIVES 7-2

CONTENTS 7-3

MAINTENANCE OVERVIEW 7-4

TML/RACE HARDWARE ARCHITECTURE 7-5

REMOTE ACCESS EQUIPMENT 7-7

ENVIRONMENT 7-8

OVERVIEW 7-9

LOGIN WINDOW 7-10

TML E3 7-11

ENVIRONMENT 7-12

OVERVIEW 7-13

CONNECTIONS 7-14

TML E3 MAN MACHINE INTERFACE 7-15

LOGIN WINDOW 7-16

CONNECTION W INDOWS 7-17

STARTING WINDOWS 7-18

MAIN WINDOWS: INTERFACE NODE 7-19

CONFIGURATION MENU 7-20

TEST MENU (1/2) 7-21

TEST MENU (2/2) 7-22

DISK MENU (1/2) 7-23

DISK MENU (2/2) 7-24

MISCELLANEOUS MENU 7-25

VIEW MENU 7-26



PE/TRD/CN/4273 14.00/EN April, 2003 xi

8. BSC E3 & TCU E3 MODULE REPLACEMENT 8-1

OBJECTIVES 8-2

CONTENTS 8-3

SAFETY INSTRUCTIONS 8-4

EXTRACTION/INSERTION OF A MODULE 8-5

LOCATION OF MODULES 8-6

MODULE R EPLACEMENT PROCEDURE 8-8

GENERAL PRINCIPLES 8-8

OMU MODULE 8-9

PRIVATE MMS MODULE 8-10

SHARED MMS MODULE 8-11

ATM-SW MODULE 8-12

ATM-RM MODULE 8-13

TRM MODULE 8-14

TMU MODULE 8-15

CEM MODULE 8-16

8K-RM MODULE 8-17

BOARDS OF THE LSA-RC MODULE 8-18

SIM MODULE 8-19

FAN UNIT 8-20

AIR F ILTER 8-21

9. GLOSSARY 9-1

BSCe3 and TCUe3 Local Maintenance

V14.00/EN June 20030

The copyright of this document is the property of Nortel Networks. Without the written consent of Nortel Networks, given by contract or otherwise, this document must not be copied, reprinted or reproduced in any material form, either wholly or in part, and the contents of this document, or any methods or techniques available therefrom, must not be disclosed to any other person whatsoever.

BSCe3 BSCe3 andand TCUe3 Local TCUe3 Local MaintenanceMaintenance

Course #1596Course #1596


V14.00/EN June 20031


Section 1Section 1

IntroductionIntroduction


V14.00/EN June 20032

2NORTEL NETWORKS CONFIDENTIAL

BSS, NSS and GPRS Courses

1 dayV14 BSS Operation & Maintenance for V12 Experts

OMV14

2 daysBSCe3 and TCUe3 Local Maintenance

OML14

5 daysBSC, TCU and BTS S8000Local Maintenance

OM363 daysBSC and TCU Local MaintenanceOM314 daysBSS Operation and Fault HandlingOM92 daysS8000 BTS Local MaintenanceOM64 daysOMC-R AdministrationOM410 daysBSS Operation and MaintenanceOM1/2

BSS Operation & Maintenance Courses

3 daysBSCe3 and TCUe3 Installation and Commissioning

PIC13

BSS Installation & Commissioning

5 daysNetwork and RF Engineering Course

NETRF12 daysCell Planning FundamentalsCP13 daysRF BasicsRF01 dayCellular Network Engine. ProcessCNE

Radio and Network Engineering Courses

1 dayATM OverviewTL42 daysTCP/IP OverviewTL31 dayFrame Relay OverviewTL22 daysTelecommunications OverviewTL1

3 daysGSM System OverviewSYS

5 daysGSM System and Products Overview

SY12 daysGSM General OverviewSY0

System Courses

2 daysGSM GPRS SYSTEM RELEASE V14

SR14.22 daysBSS DimensioningSY2

2 daysBSCe3 and TCUe3 AdvancedDescription

PR42 daysBSS Products OverviewPR3

2 daysS8000 BTS FamilyAdvanced Description

PR1

2 daysNetwork Monitoring and Optimization

NMO3 daysBSS Optimization ParametersNE2

2 daysBSC 12000 and TCUAdvanced Description

BS21

3 daysAdvanced Radio Interface Description

ARI

BSS System Courses

5 daysGSM CCS7 Transl. and Operations

9745 daysGSM HLR Service Datafill97210 daysGSM-MSC/VLR Translations9702 daysSDM/FT Maintenance95510 daysGSM DMS Maintenance Part 29515 days GSM DMS Maintenance Part 19502 daysOMC-S Overview & Operation937

3 days GSM HLR-PS (Provisioning Server)

9352 daysGSM NSS Overview9313 daysGSM DMS Overview930

4 daysGSM Intelligent Networks Overview

9003 daysDMS XA-CORE Maintenance487

NSS System Courses

GP0 GPRS General Overview 1 dayGP1 GPRS Technical Description 3 daysGP3 SGSN Configuration and Operation 3 daysGP20 PCUSN Description and Configuration 4 daysGP21 PCUSN performance Management 2 daysGP22 PCUSN Integration and

Fault Management 3 daysGP5 OMC-D Operation 5 daysGP6 Charging Gateway Operation 1 dayGP8 SIG Operation 1 dayGP100 PCUSN Local Maintenance 4 days

GPRS Courses

GSM/GPRS Training Curriculum

The BSS and NSS training courses are split into several families according to the different skills required to deal with GSM networks:

System: general knowledge about GSM, as well as a general view of the different Telecom technologies.

BSS System: general knowledge of the BSS system: products, dimensioning, optimization.

BSS Operation and Maintenance: how to operate and maintain a telecommunication network by using the OMC-R facilities fully. It gives an in-depth understanding of BSS functions and equipment.

NSS System: knowledge of the operation and maintenance of the NSS part of the system.

Radio and Network Engineering: cell planning, BSS network topology, field tests, data fill or BSS parameter optimization.

BSS Installation and Commissioning: how to install, cable, and run on-site tests.

GPRS: an overview of this new system and an advanced description of the new nodes.


V14.00/EN June 20033


UMTS Training CurriculumUMTS Courses

2 daysSBAUM957

3 daysWireless DMS XA-Core Maintenance

UM956

5 daysUMTS GPP IWFUM938

5 daysWireless DMS HLR ServicesDatafill

UM972

10 daysWireless DMS MSC/VLR Translations

UM970

2 daysUMTS01/GSM 14 Delta ReleaseUM966

2 daysWireless SDM-FT MaintenanceUM955

10 daysWireless DMS Maintenance Part 2UM951

5 daysWireless DMS Maintenance Part 1UM950

2 daysWireless Circuit Core Network Overview

UM9313 daysWireless DMS OverviewUM930

5 daysWireless DMS Intelligent Networks Operation and Datafill

UM900

Circuit Core Networks Courses

5 daysUMTS Radio Network Planning Project

UM42

3 daysUMTS Radio Network Planning Fundamentals

UM41

2 daysUMTS RF Engineering Fundamentals

UM40

Radio and Network Engineering Courses3 daysGGSN Configuration and

OperationUM642

3 daysUMTS Passport 7K & 15KOperation

UM640

5 daysWireless Gateway Configurationand Troubleshooting

UM641

1 dayShasta GGSN First LineMaintenance

UM101

4 daysWireless Gateway First LineMaintenance

UM100

Operation & Maintenance Courses

1 dayShasta GGSN Detailed Description

UM31

2 daysWireless Gateway Detailed Description

UM302 daysiBTS Detailed DescriptionUM222 daysiRNC Detailed DescriptionUM21

2 daysUMTS Radio Access Network Description

UM20

ProductCourses

5 daysPractical Implementation of a UMTS Access Network

UM801

1 dayiBTS Indoor Physical InstallationUM53

1 dayiBTS Outdoor Physical Installation

UM52

1 dayiRNC Physical InstallationUM51

Installation & Commissioning Courses

2 daysUMTS General OverviewUM193 daysAdvanced UMTS Radio InterfaceUM12

5 daysUMTS System & Products Description

UM113 daysUMTS System DescriptionUM101 dayUMTS IntroductionUM0

System Courses

UMTS: an overview of this new system and an advanced description of the new nodes.


V14.00/EN June 20034


BSS Nortel Technical Publications

OperationsManuals

MaintenanceManuals

ReferenceManuals

OMC-RArchitecture

and Reference

TCU

BSC

S4000Outdoor

BTS

S2000/S2000E

BTSS8000/S8002

BTS

16

06

S4000/S4000C

IndoorBTS03

22

23

53

63

S2000H/LBTS 35

34

BSS OperatingProcedures

Fault Number Description

103

S8000/S8002BTS

104

S2000H/Le-cellBTS

CT1000/Instal .Manual

38105

AdvancedMaintenanceProcedures

101

BSC/TCU

36

BSS ParametersUser Guide

32

OMC-RPreventive& Corrective

Maintenance

S4000Smart

BTS43

102

S2000/S2000ES4000BTS

ROT 14

BSC Maintenance Procedures

TCU Maintenance Procedures

MaintenancePrinciples

S2000/S2000E BTSMaintenanceProceduresS4000 BTSMaintenanceProceduresS8000 BTSMaintenanceProcedures

TML (BSC/TCU)User Manual

50

41

39

42

46

47

48

S2000 H/L BTSMaintenanceProcedures

49

TML (BTS)User Manual

51

S8002 BTSMaintenanceProcedures

84

29

CT1000User

Manuale-cell

BTS 92

e-cell BTSMaintenanceManual

90

PE/CDC/DD/0004CD-ROM of

GSM BSS NTPs


BSS Parameters User Guide+


GPRS Access NetworkParameters User Guide

CT Tools (optional)

V11/ V12O&M

Evolutions

52

60

Call Trace/Call Path Trace

AnalyzerUser Manual

20

CT7100User

Manual(BSS)

121

CT7100User

Manual(NSS)

S8006 BTSMaintenanceProcedures

85

106

PCUSN

SecurityAdministration

SMS-CBand Help

130

BSS OperatingPrinciples

07

Objectsand

Faults

128

ConfigurationPerformance

andMaintenance

129

BSSParametersDictionary

124

ObservationsCounters

Dictionary

125

PCUSN 91

BSC e3and

TCU e3126

BSC e3 andTCU e3

132131

BSC e3and

TCU e3

BSS NetworkInventoryTool

123

GeneralInformation

BSSOverview

01

BSS ProductDocumen-

tationOverview

00

Whats newin the

BSS V12NTP suite

88

GPRSOverview

117

The BSS product documentation or BSS Nortel Technical Publications comprises 53 manuals. The BSS NTPs (except optional NTPs) are available in the CD-ROM of GSM BSS NTPs (PE/CDC/DD/0004).

Main kinds of manual:

General information

BSS Product Documentation Overview (00) is a general manual thatintroduces all the manuals of BSS NTPs and includes the glossary.

BSS Overview (01) is an overview of the digital cellular network and of its division into subsystems.

Reference manuals detail each subsystem or equipment in terms of the architecture, hardware and software of its modules and indicate general dimensioning rules.

Maintenance manuals include both preventive and corrective maintenance and details of the various maintenance procedure. BSS Maintenance Principles describes the principles of maintenance and gives the list of faults.

Operating manuals

BSS Operating Principles gives the general principles of operation and a dictionary of GSM parameters and observation counters.

BSS parameters User Guide (optional) aims at describing BSS GSM and Nortel Networks parameters, formulae and engineering issues for algorithm parameters; this manual is available in the CD-ROM (PE/CDC/DD/0026).


V14.00/EN June 20035


Contents

Introduction BSC e3 and TCU e3 Functional Architecture BSC e3 and TCU e3 Board Description Thermic, Energetic and Cabling Aspects Hardware Features, Configuration and Dimensioning. BSC e3 and TCU e3 Startup BSC e3 Troubleshooting BSC e3 and TCU e3 Module Replacement Annex: ATM Reminders Glossary


V14.00/EN June 20036


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

Describe the hardware and functional architecture of the BSC e3 and the TCU e3

Describe the boards functions and interfaces

Identify with leds the equipment status

Troubleshoot the Equipment with the TML.

Objectives


V14.00/EN June 20037


Section 2Section 2BSC e3 and TCU e3 BSC e3 and TCU e3

Functional ArchitectureFunctional Architecture


V14.00/EN June 20038


Objectives

After completion of this section, the students will be able to:

Recognize the BSC e3 and TCU e3 Cabinets

Describe the internal architecture of the BSC e3 and TCU e3

Describe the different functions handled by each Node.


V14.00/EN June 20039


Contents

BSS in the GSM Network

BSS Architecture

BSC e3 and TCU e3 External Links

BSC e3 and TCU e3 Presentation

BSC e3 Architecture

TCU e3 Architecture


V14.00/EN June 200310


BSS in the GSM Network

TCU

BSC

OMC-R

MSC

RadioInterface

A Interface

Ater Interface

Abis Interface

NSS

BSS

OMN Interface

Public TelephoneNetwork

MS

MS

S2000H&LBTS

S8000Indoor

BTS

S8000Outdoor

BTSSun StorEdge A5000

RadioInterface

E-CellBTS

PCUSN

Agprs Interface

GPRS Core Network

Internet Gb Interface

The Base Station Subsystem includes the equipment and functions related to the management of the connection on the radio path.

It mainly consists of one Base Station Controller (BSC), and several Base Transceiver Stations (BTSs), linked by the Abis interface.

An equipment, the Transcoder/Rate Adapter Unit (TRAU) so called TransCoder Unit (TCU) within Nortel Networks BSS products, is designed to reduce the number of PCM links.

These different units are linked together through specific BSS interfaces:

each BTS is linked to the BSC by an Abis interface,

the TCUs are linked to the BSC by an Ater interface,

the A interface links the BSC/TCU pair to the MSC.


V14.00/EN June 200311


BSS Architecture

BSC e3

AterA

MS

AirTCU e3

TCU 1

TCU 0

ServiceAreaInterface

TCP/IPEthernet

MSC/HLR

DMS

Remote RACE client

PSTN


Control

Node

Interface Node


BTS

Abis

OMC-R

Optical InterfaceATM

PCUSN

OMN Interface

Agprs

GPRS CoreNetwork

Internet

Gb Interface

The hardware architecture of the BSC e3 is based on 2 platforms:

The Control Node is a multi-application platform (computing and signaling) built around an ATM -based switch (CC1 boards). It performs:

Call Processing

BSS OAM functions.

The Interface Node (as well as the TCU) is based on the Spectrum platform. It provides dense PCM connectivity on the Abis and Ater interfaces and an optional optical fiber interface (SONET = Synchronous Optical NETwork) towards external equipment. It includes:

a 64 kbit/s time switch for DS0 path switching

a 8 kbit/s time switch for Voice path switching.

Maximum Capacity

The highest configuration of the BSC e3 and TCU e3 is able to handle up to 3000 Erlangas maximum traffic load.

Note

DS0 = Digital Signal level 0 : digital signal transmitted at the nominal rate of 64 kbps (PCM 30).


V14.00/EN June 200312


BSC e3 and TCU e3 External Links

BTS BSC TCU MSC

OMC-R

Ethernet

LAPDOML

LAPDRSL

LAPDOML

SS7

PCUSN

LAP

D O

ML

GPRS

VoiceData

Dat

a

LAPDGSL

LAP

D R

SL

LAP

D G

SL

Agprs

Abis Ater

Three types of signaling are transported over the Abis Interface:

LAPD/OML related to Operation and Maintenance,

LAPD/RSL related to Radio Signaling Link,

LAPD/GSL related to GPRS Radio Signaling Link.

The BSC can be connected to the OMC-R through an Ethernet network or through the A Interface.

Two types of signaling can be transported over the Ater Interface:

the LAPD/OML for control of the TCU transcoders by the BSC,

the SS7 going to the MSC.

Three types of GPRS signaling can be transported over the Agprs Interface:

the LAPD/OML for control of the PCUSN by the BSC,

the LAP/RSL for control of Radio Signaling Link,

the LAPD/GSL for control of GPRS Radio Signaling Link.


V14.00/EN June 200313


BSC e3 and TCU e3 Mixed System Architecture

TCU 2GV12.4

(TCB2)

BSC 2GV12.4 BSC e3

V14.3BSC e3V14.3

TCU e3V14.3

BTSsV12.4

BTSsV12.4

BTSsV14.3

X.25

Ethernet

OMC-RV14.3

PCU SNV14.3

TCU 2GV12.4(TCB2)

The BSC e3 and TCU e3 are intended to interwork with current BSC 2G (12000), BTS and OMC-R products.

Note that BSC e3 is able to support TCU 2G as well, but only with TCB2 boards (EFR).

The OMC-R - BSC e3 link is TCP/IP over Ethernet, instead of native X.25 for BSC 2G.

The OMC-R BSC e3 link over A/Ater Interface is not available in the V14.3 release (V15 candidate feature).

Either TCU 2G and/or TCU e3 can be used to recover the synchronizing clock and to carry SS7 links.

Each TCU (2G and e3) requires LAPD link to communicate with BSC e3.


V14.00/EN June 200314


BSC e3 and TCU e3 Presentation

BSC e3 TCU e3

The BSC e3 and the TCU e3 are one-cabinet equipment, composed of two Nodes and one Service Area Interface.

These Nodes are each housed in a sub rack comprising two shelves.

The cabinet is designed for indoor applications.

The design allows front access to the equipment.

External cabling from below or above is supported.

The Service Area Interface or SAI is installed on the left side of the cabinet:

It provides front access to the PCM cabling.

It contains the electrical equipment to interface the BSC or the TCU and the customer cables.

The product is EMC compliant. No rack enclosure is required for this reason, as EMC compliance is achieved at the sub rack level (Control and Interface Node).


V14.00/EN June 200315


ServiceArea

Interface ControlNode

InterfaceNode

BSC (doors closed) BSC (one door open)

ServiceArea

Interface

Power Supplies

Fans

BSC e3 Architecture

1 - Description

Fans

ControlNode

InterfaceNode

The BSC e3 is a one-cabinet equipment, composed of 3 frames:

The Control Node (one upper dual-shelf assembly located above the Interface Node). It is ATM-based and ensures:

GSM call & signaling processing

Operation, Administration & Maintenance of the BSS.

It is connected to the Interface Node by two optical fiber cables (one for Transmission and one for Reception) with a standard ATM interface.

The Interface Node (one lower dual shelf). It is also ATM-based and provides:

PCM connectivity (and an optional fiber interface in the future) towards the TCU, BTS and PCU

Circuit switching functions.

The Service Area Interface is installed on the left side of the cabinet. It provides:

Front access to the PCM cabling

An interface between the BSC e3 and the customer cables.

The BSC e3 supports major GSM features, such as GPRS, the new vocoder AMR (Adaptive Multi-Rate FR) and the new modulation scheme EDGE


V14.00/EN June 200316


BSC e3 Architecture

2 - Functional Architecture

Optical Interface

AterInterface

TCU

AbisInterface

BTS

OMU

OAM

Control Node

ATM SW

Interface NodeATM RM

LSA RC

PCM Interfac

e

CEM

64 kbps

LSA RC

PCM Interfac

e

Switching Unit

8 kbps

8K RM

TMU

TrafficMgt

TMU

TrafficMgt

TMU

TrafficMgt

BSC e3

The Control Node is a computing and signaling platform built around an ATM Switch.

It contains the BSC processing core that handles overall BSC operations including Interface Node operations, and enables communication with the OMC-R.

It is composed of the following three functional modules:

the ATM SW (Asynchronous Transfer Mode Switch)

the OMU (Operation and Maintenance Unit)

the TMU (Traffic Management Unit).

The Interface Node is a circuit switch platform which provides dense PCM connectivity.

It is made up of the following four major hardware modules:

the ATM-RM (Asynchronous Transfer Mode Resource Module)

the CEM (Common Equipment Module)

the 8K RM (8K subrate matrix Resource Module)

the LSA RC (Low Speed Access Resource Complex).

NB: The BSC e3 cabinet is powered by four SIMs (Shelf Interface Module).


V14.00/EN June 200317


ServiceArea

Interface TranscodingNode

TranscodingNode

ServiceArea

Interface

Power Supplies

Fans

TCU e3 Architecture

1 - Description

Fans

TCU (doors closed) TCU (one door open)

TranscodingNode

TranscodingNode

The TCU e3 is a one-cabinet equipment, composed of 3 frames:

Two Transcoding Nodes (one dual-shelf per transcoder node) is designed to reduce the number of PCM links needed to convey radio speech and data channels in the BSS. It provides:

Switching: the TCU e3 manages a multiplexer connecting the BSC and MSC.

PCM link management: using the configuration data provided by the BSC e3, the TCU e3 configures and monitors the PCM links on the A and Ater interfaces.

Transcoding and rate adaptation: coding/decoding of speech frames and rate adaptation.

TCU e3 equipment management: OAM functions: initialization, startup, clock synchronization from A interface links, supervision, faultmanagement, software and configuration management.

The Service Area Interface is installed on the left side of the cabinet. It provides:

Front access to the PCM cabling

An interface between the TCU e3 and the customer cables.

The TCU supports the new vocoder AMR, allowing half-rate and enhanced voice quality full rate communications.


V14.00/EN June 200318


TCU e3 Architecture

2 - Functional Architecture of a Transcoding Node

AterInterface

BSC

Transcoding Node

TRM12

2

TRM1

S links

LSA RC

PCM Interfac

e

LSA RC

PCM Interfac

e

AInterface

MSCS linksS links

CEM

64 kbps

The Transcoding Node performs the following main tasks related to communication, switching and transcoding.

The TCU e3 cabinet is made of two Transcoding nodes.

It is composed of the following three major hardware modules:

The CEM (Common Equipment Module)

The TRM (Transcoding Resource Module)

The LSA RC (Low Speed Access Resource Complex).

NB: The TCU e3 cabinet is powered by four SIMs (Shelf Interface Module).


V14.00/EN June 200319


Section Section 33BSC e3 BSC e3 andand TCU e3 TCU e3 BoardBoard DescriptionDescription


V14.00/EN June 200320


Objectives


Understand how each module interacts with the other ones within the BSC e3 and TCU e3.

Know the physical characteristics of the BSC e3 and TCUe3.


V14.00/EN June 200321


Contents

Control Node Boards

Interface Node Boards

Transcoding Node Boards


V14.00/EN June 200322


Control NodeControl Node


V14.00/EN June 200323


Control Node

1 - Architecture

ATM links 25 Mb/s

ATM li

nks

25Mb

/s

ATM links25 Mb/s

ATM links25 Mb/s

TMUTMU1 14

TrafficMgt

TMU

TrafficMgt

TrafficMgt

1 2

Private Disk

Private Disk

Mirrored Shared Disks

PassiveOMU

ActiveOMU

OAM

Ethernet Link

ATM SW ATM SW25Mb/s

TowardsInterface Node

TowardsInterface Node

ATM Links155 Mb/s

ATM Links155 Mb/s

The Control Node is the processing unit of the BSC e3. It is an ATM-based engine that handles the following functions:

OAM

Traffic Management

Call & Signaling processing.

These main functions are performed by three sub-assemblies:

OMU = Operation and Maintenance Unit (OA&M + Disk Management)

ATM-SW = ATM Switch (Interconnection between OMUs and TMUs with Communication Controller boards and optical connection with the Interface Node)

TMU = Traffic Management Unit (Traffic Management + Signaling Processing).

The platform is full ATM inside: the links between the different modules inside the CN are ATM links at 25 Mb/s, they are all redundant for safety reasons.

The Control Node is connected to the Interface Node by an optical fiber cable based on a standard ATM interface at 155 Mb/s.


V14.00/EN June 200324


Control Node

2 - Hardware ModulesS

hel

f 01

Sh

elf

00

ATM

SW

ATM

SW

7 8O

MU

OM

U

1095 6

SIM

BS

IM A

15

15

MM

SP

riva

te

10M

MS

Sh

ared

9

MM

SP

riva

te

5

MM

SS

har

ed

6

BSC e3 Control NodeDual Shelf 01 Shelf

00

Dual Shelf 01 Shelf 01

TMU

141

TMU

TMU

TMU

TMU

TMU

TMU

TMU

TMU

TMU

TMU

TMU

TMU

TMU

13 1411 123 41

1311 123 4

Fill

er

Fill

er

Fill

er

Fill

er

7 82

2

The OMU (Operation & Maintenance Unit) controls all the BSC e3 elements (both Control and Interface Nodes) and TCU e3 elements, is responsible for Operation, Administration and Maintenance (OA&M) of the BSS, deals with disk management, and ensures Ethernet access to the OMC-R and TML.

The MMS (Mass Memory Storage) are the 4 storage disks (2 private disks for OMUs and 2 shared disks; one of these shared disk only is mandatory). If the private MMS is in default state, the whole BSC e3 is in Exposure state.

The ATM SW is the ATM switch that provides the interconnexion between the OMU and the TMU modules. It also provides connectivity with the Interface Node through an OC-3c link.

The TMU (Traffic Management Unit) is in charge of GSM traffic and signaling processing (LAPD and SS7).

The SIM (Shelf Interface Module) is the power supply for both shelves and the alarm interface between the dual-shelf and the PCIU. It provides 48 V dc to the Control Node. For redundancy purposes, there are 2 SIMs per equipment: each SIM contributes to supply each shelf (at 50% level).

Filler Boards are empty containers which occupy any unused slots to ensureEMC shielding.

Duplication schemes:

1 + 1 redundancy = 1 active element + 1 passive (or active) element.

N + P redundancy = N active elements to provide the targeted performance. P means that P boards can be in default state, without loosing any established communication.


V14.00/EN June 200325


Control Node

3 - The CN Slices

The CN Slices: OMU MMS ATM-SW TMU

Common Architecture inside each CN module

Generic Module View

1

2 3

A slice is the name given to a set of boards plugged into a slot on a shelf.

The Control Node is composed of the following slices:

OMU, MMS, TMU and ATM-SW

Plus SIM and Fillers.

The OMU, TMU and ATM -SW slices have a common hardware architecture and are divided into 3 parts:

A Single Board Computer board (SBC) = Computer Board.

A PCI Mezzanine Card (PMC) = Front Panel Board.

A Transition Module board (TM) = Interface Adapter Board.

To identify each part of the slice, suffixes have been added to the board names:

xxx SBC Single Board Computer

xxx TM Transition Module

xxx PMC PCI Mezzanine Card

Each module has two visual indicators on the top of the front panel, which indicate its status:

A red LED with a triangular shape,

A green LED with a rectangular shape.


V14.00/EN June 200326


Control Node

4 - TM Functions

MAIN FUNCTION: ATM ADAPTATION

TMU

VME & SC-Bus

to

ATM

conversion

OMUVME

Interface with SBC

+ ATM 25

Interface with ATM-SW.

ATM-SWSBC

Interface with CN

backplane +

OC-3c Optical

Interface

The TM (Transition Module) is mainly an ATM Adapter.

All communication between modules on the ATM subsystem uses ATM Adaptation Layer (AAL) protocols.

The TM is responsible for:

Adapting the VME-64 Bus to ATM variable bit-rate:

IP packets carrying internal BSC communications are translated over ATM using the AAL5 protocol.

AAL5 is routed by the CPU to / from the SBC board via a VME bus.

The TM carries traffic between each module inside the CN and the IN.

Adapting the SC-Bus to the ATM constant bit-rate:

LAPD & SS7 links carried on PCM TS (DS0) are translated over ATMusing the AAL1 protocol.

AAL1 is routed to / from the PMC board via an SC-Bus.

It carries messages between the BSC and MSC and OAM information for the entire BSS.

Board Location: in the OMU, TMU and ATM -SW modules.


V14.00/EN June 200327


Control Node

5 - Memory Mass Storage


Always available

When OMU 1 active

When OMU 2 active

Private DiskFor OMU 2

O.S.

Private DiskFor OMU 1

O.S.

OMU 1

Active OMU

OMU 2

Spare OMU

Front

Panel

ViewSCSI-bus

BSS

BSS

Removal Request Push

Button


MMS MAIN FUNCTION: DATA STORAGE

Ethernet Link

The MMS (Memory Mass Storage) modules are SCSI 9 Gbytes Hard Disks in the Control Node.

These 4 MMS are linked to the OMU modules through 4 SCSI-buses.

They are split as follows:

Two mirrored shared hard disks for both OMU modules. They contain the data that must be secured and still be accessible in the event of an OMU failure or a disk failure (BSS data).

Two private disks (one for each OMU). These disks hold all the private data for the module (Operating System data).

External Interfaces on the Front Panel:

Two LEDs,

One removal request push button

Redundancy scheme: 1 + 1 operating simultaneously for the mirrored shared disks.

Board Location: Dual Shelf 01, Shelf 00, slots 5 & 6 & 9 & 10.

LED Status:

Disk operational and UpdatedLit Unlit

StatusGreen LEDRed LED


V14.00/EN June 200328


Control Node

6 - OMU

Front

Panel

View

RJ45

Unused

Removal Request

Push-button

D-sub 9-pins For RS 232 debug

OMU Module

TML

OMC-R

OMU MAIN FUNCTION: MANAGEMENT OF ALL THE BSC RESOURCES

Disk Management

MMS

Private

OMU

TM

Board

VME

Board

Ethernet Link

SCSI Buses

RS 232 Debug Bus

ATM 25 link with

ATM-SW

Ethernet linkwith OMU

BACKPLANE

MTM Bus

(Board Reset and LED commands)

MMS

Private

2 MMS

Shared

For D

uplica

tion

The OMU (Operation and Maintenance Unit) manages all the BSC resources.

It does the following:

Disk management (Private and Shared MMS; private disk duplication),

Interface with the OMC-R or TML through an Ethernet access.

System maintenance (by using the TML) and OAM of the BSS.


Two LEDs,

One RJ45 connector for one 10/100 base T Ethernet OMC-R + TML port,

One 9-pin D-sub connector for the RS 232 debug port,

One removal request push button (shut down and SWACT of the OMU)

Redundancy scheme: 1 + 1 Hot Stand-by.

Board Location: Dual Shelf 01, Shelf 01, slots 5+6 & 9+10.

LED Status:

ATM layers: OMU -TM board.

Base Operating System: AIX Module active and Unlocked

Lit Unlit



V14.00/EN June 200329


Control Node

7 - ATM SWitch

Towards / FromATM-RM

Interface Node

OMU

Active

OMUOAM

TMU

TrafficMgt

Front

Panel

View

TX OC-3c Connector

To RX on the IN

RX OC-3c ConnectorFrom TX

On the IN

ATM-SW MAIN FUNCTION: BOARDS INTERCONNEXION

OC-3 LinkATM 155 Mb/s

ATM SWitch

Utopia Bus

AT

M 1

55 I

nt.

Op

tica

l In

terf

ace

6 x ATM 25

3x ATM 25 Interface

ATM SW

BACKPLANE

The ATM SW (ATM Switch) provides a backplane board interconnection with live insertion capabilities.

It provides:

interconnection between the OMU and TMU modules,

ATM switching, adaptation and interface on an OC-3 optical multimode fiber towards the Interface Node. The TX connector on the ATM-SW is linked to the ATM-RM RX connector; the RX connector on the ATM -SW is linked to the ATM-RM TX connector.


Two LEDs,

1 TX OC-3 (upper) + 1 RX OC-3 (lower) optical connectors

Redundancy Scheme: 1+ 1 simultaneous work

Board Location: Dual Shelf 01, Shelf 01, slot 7 & 8.

LED Status:

Base Operating System: Vx Works Module active and Unlocked

Lit Unlit



V14.00/EN June 200330


Control Node

8 - TMU

Front

Panel

View

TMU Module

ATM 25 link with

ATM-SW

VME

BoardTMU

TM

Board

SCSI Buses+ VME Buses

VME link with OMU

BACKPLANE

The TMU (Traffic Management Unit) manages traffic. It is equivalent to a set of three boards in the 2G release (SICD + CCS7 + BIFP).

It is in charge of:

GSM & GPRS traffic management,

GSM signaling processing (LAPD & SS7)

GPRS signaling processing

BTS OAM (software downloading, BTS configuration).


Two LEDs

Redundancy Scheme: N + P load sharing.

Board Location: Dual Shelf 01, Shelves 00 & 01, slots 1 & 3 & 4 & 11 to 14.

LED Status:

Base Operating System: Vx Works

ATM layers: TMU TM board.

Note: Each TMU provides: 62 LAPD links + 2 SS7 links.

Module active and UnlockedLit Unlit



V14.00/EN June 200331


Control Node

9 - Minimal Configuration for the CN

1 OMU

The corresponding Private MMS

1 shared MMS

1 ATM-SW (+ the corresponding ATM-RM in the IN)

n TMUs (according to the traffic load)

1 SIM


V14.00/EN June 200332


Interface NodeInterface Node


V14.00/EN June 200333


Interface Node

1 - ArchitectureATM RM

LSA RC

PCM Interface

LSA RC

PCM Interface

S links

S links S links

AterAbisTOWARDS

TCU

TOWARDS

BTS

Switching Unit

CEM

64 kbps

8K RM

8 kbps

TOWARDS CN

The Interface Node is based on the Nortel Networks SPECTRUM platform.

The Interface Node provides:

Network connectivity on the Abis & Ater interfaces.

Communications with the Control Node.

16 kbps or 8 kbps circuit switching for the bearer speech / data channels between the BTSs and the MSC via the TCU e3.

It shares some major hardware modules with the Transcoding Node, such as the CEM and LSA-RC boards.


V14.00/EN June 200334


Interface Node

2 - Board Layout

SIM

S

IM

15

15

Fill

er

Fill

er

Fill

er

Fill

er

1471

11

CE

M

CE

M

7 8

8K-R

M

8K-R

M

109

5 6

AT

M R

M

AT

M R

M

BSC e3 Interface Node



SH

EL

F 0

0S

HE

LF

01

2 3 4

LS

A R

C

N1

LS

A R

CN

2

108 9

LS

A R

CN

3

1311 12

4 5 6

LS

A R

CN

0

LS

A R

CN

5

31 2 13 1412

LS

A R

CN

4

Synchronization

The Interface Node is the connectivity component of the BSC e3, after the SAI.

It is responsible for:

establishing all the connections between the BSC and the other entities of the network

supervising the physical links.

The Interface Node is divided into the following hardware modules:

The CEM (Common Equipment Module), which controls the resource modules of the IN, provides system maintenance, clock synchronization and traffic switching.

The ATM RM (ATM - Resource Module), which adapts Time Slots (DS0) based voice and data channels of S-links to ATM cells for transmission over a Synchronous Optical NETwork (SONET), OC-3c interface,

The 8K RM (8K subrate matrix Resource Module), which adds subrate switching capability to the IN, as the CEM is only capable of switching at a TS (DS0) level (64 kbps).

The LSA RC (Low Speed Access Resource Complex), which is the PCM interface module, used to interface the BSC to both the TCU and BTS, providing modularity (up to 21 E1 or 28 T1 links). Each LSA-RC block consists of 3 boards. They must be inserted in ordered steps.

The SIM (Shelf Interface Module) is the power supply for both shelves and the alarm interface between the dual-shelf and the PCIU. It provides 48 V dc to the Interface Node. For redundancy purposes, there are 2 SIMs per equipment: each SIM contributes to supply each shelf (at 50% level).


V14.00/EN June 200335


Interface Node

Alarmsprocessing

Switching Unit

ClockSynchronization

OAMInterface

TML

Ethernetlink

Front

Panel

View

3 - CEM

Unused

RJ45

ATM RM

PCM Interface

LSA RC

3 S-links3 S-links

SWITCHING

CEM

9 S-links

CEM MAIN FUNCTION: MASTER BOARD FOR THE IN

Caution: only rescue way of

connection

The CEM (Common Equipment Module) is the master board of the Interface Node.

It provides the following features:

64K Traffic Switching Matrix,

OA&M interface,

Control of the Resource Modules (8K RM, ATM -RM and LSA RC),

Clock synchronization,

Alarm processing,


Two LEDs,

RJ45 connector (Ethernet Link) for TML ( rescue connection only)

4 unused connectors.

Redundancy scheme: 1 + 1 Hot Stand-by

Board Location: Dual Shelf 00, Shelf 00, slots 7 & 8

LED Status:

Module active and Unlocked

LitUnlit



V14.00/EN June 200336


Interface Node

4 - 8K RM

Front

Panel

View

Unused

Switching Unit

CEM

9 S-links

8K-RM MAIN FUNCTION: SUB RATE SWITCHING

SUB RATE

SWITCHING

8K RM

The 8K RM (8K Resource Module) is also named SubRate Time Switch.

Its role is to provide a subrate switching capability, as the CEM module only switches at the DS0 level (64 kbps). The 8K RM switching activity is controlled by the CEM Module.

The 8K RM can switch at DS0 sublevels: 8 kbps and 16 kbps, and its total switching capacity is 2268 DS0 channels.

It performs the following functions:

Transmits and receives data to / from both CEM modules through 9 S-links,

Provides 8 kbps time-switching.


Two LEDs,

4 unused connectors.

Redundancy scheme: 1+ 1 Hot Stand-by.

Board Location: Dual Shelf 00, Shelf 00, slots 9 & 10

LED Status:

Module active and UnlockedLitUnlit



V14.00/EN June 200337


Interface Node

ControlNode

InterfaceNode

ATM RM

AAL1LAPD, SS7

AAL5OAM, CallP

RedundantOptical

Connection

OC-3c Link155 Mb/s

5 - ATM RM

ATM SW

CEMCEM

3 S-links(768 TS)

3 S-links(768 TS)

ATM-RM MAIN FUNCTION: ATM RESOURCES FOR IN APPLICATIONS

Front

Panel

View

TX OC-3c ConnectorTo RX on the CN

RX OC-3c ConnectorFrom TX

On the CN

TX

RX

The ATM RM (ATM Resource Module) provides the centralized resources required to support the Interface Node applications.

It performs:

A SONET OC-3c physical interface, that allows direct connection to the ATM network located in the Control Node. Caution an optical attenuator must be inserted on the TX connector output.

adaptation between the ATM cells of the Control Node (high bitrate: 155 Mbps) and the DS0 circuits of the Interface Node (low bitrate: 64 kbps):

AAL1 adaptation for LAPD and SS7 channels

AAL5 adaptation for OAM and Call Processing Signaling.


Two LEDs

1 TX OC-3 (upper) + 1 RX OC-3 (lower) optical connectors.

Redundancy scheme: 1+ 1 (simultaneous work).

Board Location: Dual Shelf 00, Shelf 01, slots 5 & 6.

LED Status:

Operating System: VRTX


Lit Unlit



V14.00/EN June 200338


Interface Node

6 - LSA-RC Module 1/3

LSA RC MAIN FUNCTION: PCM INTERFACE MODULE

Backplane

To SAI

IEM

TIM

IEM

Active Passive

From SAI

LSA RC Module

The LSA RC (Low Speed Access Resource Complex) is the PCM Interface module. All external communications run through this board.

Each LSA RC can manage up to 21 E1 or 28 T1 PCM links.

It provides the electrical interface for the signal on the PCM links.

This module is common to the Interface Node and the Transcoding Node.

In the IN, it is used to interface the BTS and the TCU.

In the Transcoding Node, it is used to interface the MSC and the BSC.

Each LSA block is a 3-slot slice made of:

2 IEM boards (Interface Electronic Module), which are in charge of the PCMs.

1 TIM board (Terminal Interface Module) which is a passive board that routes the PCM towards the active IEM board.

Redundancy scheme:

for IEM: 1 + 1 Hot Stand-by

For TIM: no redundancy (only connecting and filtering functions).


V14.00/EN June 200339


Interface Node


Front Panel View for PCM

T1 links

Signal Failure Indication

Red LED blinks

Up and down Buttons

2

1

3

4

5


Red LED blinks

Up and down Buttons


E1 links

62-pin Sub D Connector

to SAI

62-pin Sub D Connectorfrom SAI


IEM board.

1) Two status LEDs

2) One multiple Span Failure Red LED

3) Signal Failure Indication head LEDs

4) Visual Display unit for span number

5) Up and Down arrow buttons.

TIM board.

Two LEDs

1 TX Sub D 62-pin (upper) + 1 RX Sub D 62-pin (lower) connectors.

Board Location:

Dual Shelf 00, Shelf 00, slots 1 & 2 & 3 + slots 4 & 5 & 6 + slots 12 & 13 & 14.

Dual Shelf 00, Shelf 01, slots 2 & 3 & 4 + slots 8 & 9 & 10 + slots 11 & 12 & 13.

LED Status


LitUnlit



V14.00/EN June 200340


Interface Node


LSA RC FAILURE INDICATORS

* NO information is displayed when there is NO problem to report.

* Only the highest severity signal failure is displayed on the front panel LEDs.

FRONT PANELS DETAILS


T1 links


E1 links


Red Multiple Span Alarms

Up and Down Buttons

PCM Failure Indication

The interactive portion of the faceplate consists of the following elements:

Multiple span failure indication red LED:

LED OFF: zero or one PCM failure

LED BLINKS: two or more PCM failures.

Signal failure indication LEDs (transparent text cover), same behavior for all the alarms: LED ON: when the fault is the highest ranking fault

LED OFF: when the fault is no longer the highest ranking fault.

LOS: Loss of Signal

AIS: Alarm Indication Signal

LFA (for E1): Loss of Frame Alignment = LOF (for T1): Loss Of signal Frame alignment

RAI: Remote Alarm Indicator.

PCM failure indicator:

BLANK if IEM module not in service, and for the inactive IEM module.

Text OK if there is NO provisioned PCM link failure.

Text XX: problem with copper connection between the IEM and the SAI.

Number from 1 to 21 for E1 links, and from 1 to 28 for T1 links.

Increment / decrement control to show alarms for multiple failed spans: pressing the Up or Down arrow key will increment or decrement the information displayed to the next fault alarm.


V14.00/EN June 200341


Interface Node

7 - Minimal Configuration for the IN

1 ATM-RM (+ the corresponding ATM-SW in the CN)

1 CEM

1 8K RM

n LSA-RC (= 1 TIM + 1 IEM, but always the LSA n0)

1 SIM


V14.00/EN June 200342


TranscodingTranscoding NodeNode


V14.00/EN June 200343


Transcoding Node

1 - Architecture

LSA RC

PCM Interfac

e

LSA RC

PCM Interfac

e

AterInterface

AInterfaceS linksS links

S links

CEM

64 kbps

TOWARDS MSC

TOWARDS BSC

TRMTRM

TRMTRM

1

The Transcoding Node is based on the Nortel Networks SPECTRUM platform.

Each TCU cabinet consists of 2 Transcoding Node shelves and 1 SAI (Cabling InterfaceUnit) providing front access to the PCM cabling.

The Transcoding Node does the following:

Provides network connectivity with the BSC e3 and the MSC.

Converts LAPD channels into DS0 links.

Transports SS7 signaling links via DS0 links.

Allows communication between the Transcoding Node and the Control Node via LAPD channels over DS0 links and via the Interface Node.

Manages GSM vocoding of the speech / data channels.

Reduces of the number of PCM links required.

N.B: The Transcoding Node shares some major hardware modules with the Interface Node, such as the CEM and the LSA-RC boards.


V14.00/EN June 200344


Transcoding Node

2 - Boards Layout

CE

M

CE

M

7 8F

iller

Fill

er

71

SIM

S

IM

15

15

2

LS

A R

CN

2

108 93 4

LS

A R

CN

1

LS

A R

CN

3

1311 12

4 5 6

LS

A R

CN

0

TR

M

14

TR

M

6

TR

M

TR

M

TR

M

11109

TR

M

TR

M

TR

M

TR

M

141312TR

M (

op

t)

TRM

(o

pt)

TR

M

5

321

Transcoding Node no. 01



Transcoding Node no. 00



Synchronization

SH

EL

F 0

0S

HE

LF

01

The main function of the TCU (TransCoder Unit) is to perform the main tasks related to communication, switching and transcoding.

The following hardware modules are part of the Transcoding Node:

The CEM (Common Equipment Module), which controls the BSC Interface Node Resource Modules, and provides system maintenance, clock synchronization, and traffic switching.

The TRM (Transcoder Resource Module), which performs the GSM transcoding functions. Each shelf of the TCU can contain up to 12 TRMs (the boards located in the slots 1 and 2 are optional).

The LSA RC (Low Speed Access Resource Complex), which is used to interface the TCU to both the MSC and BSC using PCM links (E1 or T1). Theymust be inserted in ordered steps.

The SIM (Shelf Interface Module) is the power supply for both shelves and the alarm interface between the dual-shelf and the PCIU. It provides 48 V dc to the TCU. For redundancy purposes, there are 2 SIMs per equipment: each SIM contributes to supply each shelf (at 50% level).


V14.00/EN June 200345


Transcoding Node

3 - TRM

Front

Panel

ViewTRM MAIN FUNCTION: VOCODING OF SPEECH / DATA

CHANNELS

PPQUICC

Mail Box

PPU SPU

SPU

SPU

SPU

PPU SPU

SPU

SPU

SPU

PPU SPU

SPU

SPU

SPU

Mail Box

PPU SPU

SPU

SPU

SPU

PPU SPU

SPU

SPU

SPU

PPU SPU

SPU

SPU

SPU

Mail Box

PPU SPU

SPU

SPU

SPU

PPU SPU

SPU

SPU

SPU

PPU SPU

SPU

SPU

SPU

#3#2

#1

1 DSP Archipelago

CEM

3 S-links

1 Island

TRM Module

The TRM (Transcoder Resource Module) performs the GSM vocoding of the speech / data channels. Up to 12 TRMs boards can be housed in one single TCU shelf.

The TRM provides:

Voice coding / decoding in Full Rate (FR), Enhanced Full Rate (EFR) and AMR.

Physical Organization: 9 Islands (1 island = 1 PPU (Pre Processing Unit) + 4 SPU (Signal Processing Unit))

3 Archipelagoes = TRM module (1 archipelago = 1 MLB (Mail Box ) + 3 Islands)

1 TRM = 216 voice channels in normal mode 1 TRM = 180 voice channels in TTY (US specific)


Two status LEDs . Redundancy scheme: N + P load sharing

Board Location:

For both Dual Shelf 00 & 01, Shelf 00, slots 1 to 3 + slots 9 to 14

Shelf 01, slots 5 & 6 & 14

LED Status:


LitUnlit



V14.00/EN June 200346


Transcoding Node

4 - Minimal Configuration for the TN

1 CEM

n TRM (according to the traffic load)

n LSA-RC (= 1 TIM + 1 IEM, but always the LSA n0)

1 SIM


V14.00/EN June 200347


Section 4Section 4

ThermicThermic, , EnergeticEnergetic andand CablingCabling AspectsAspects


V14.00/EN June 200348


Objectives


Describe the power supply, alarms and cooling system

Understand the role of the SAI

Identify BSC e3/TCU e3 cabinet cables.


V14.00/EN June 200349


Contents

Power Supply & Alarm Systems

Cooling System

BSC e3/TCU e3 Cabling

Fuses


V14.00/EN June 200350


Power Supply & Alarms Systems

1 - PCIU Module

The Power Supply and the Alarm Systems of the BSC e3/TCU e3 are composed of:

One PCIU (Power Cabling Interface Unit): provides central distribution and gathering of all power and alarm cabling used inside the BSC e3/TCU e3 frames.

4 SIMs (Shelf Interface Module): used to transfer the -48 V dc and the alarms to and from each module via the PCIU.

The PCIU is located in a frame power distribution tray and is mounted on the top of the BSC e3/TCU e3 frame. It contains the following modules:

ALM (Alarm Module): monitors the SIM modules, the cooling units and the fuse failures, provides control for each LED on the fan units, reports alarms on each dualshelf, reports the PCIU fail function.

2 FMU (Fan Management Unit): softstart used to limit capacitor inrush current, capacitor fault alarm, 48V / 60V at 30 A input capability, input transient protection alarm.

When the frame summary indicator (amber lamp) located on the front cover is:

OFF: there is no active alarm in the BSC e3 or TCU e3 frame,

ON: there is an active alarm in the BSC e3 or TCU e3 frame.


V14.00/EN June 200351


Power Supply & Alarms Systems 2 - Shelf Interface Module

Front

Panel

View

Switch On / Off

Alarm Indicators

-48 V dc / alarms Connector

To / from PCIU

SIM MAIN FUNCTION: POWER SUPPLY

SIM means Shelf Interface Module. It is the power supply of the BSC e3/TCU e3 frames. The input voltage is -48 V dc. It transmits also alarms notifications.

The SIM boards are the dc power conditioner for each Dual-shelf.

The SIM board manages the following functions:

Current limiting during Startup

Alarms

Filtered 48 V dc and Power conditioning.


Two status LEDs,

One Switch On/Off,

Amber LEDs Alarm Indicators,

A 48 V dc/alarms connector (7 pins).

Redundancy scheme: 1 + 1, simultaneous work.

Board Location: Dual Shelf 00 & 01, Shelves 00 & 01, slot 15.

LED Status:

Module active and UnlockedLitUnlit



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Cooling System 1 - Location of the Cooling & Fan Units

Upper grill

assembly

Lowergrill

assembly

The BSC e3/TCU e3 frames are cooled by two cooling units.

A cooling unit dedicated to the upper dual-shelf and including:

The upper grill assembly

The upper air filter

The upper fan units.

A cooling unit dedicated to the lower dual-shelf and including:

The lower grill assembly

The lower air filter

The lower fan units.


V14.00/EN June 200353


Cooling System

2 - Cooling & Fan UnitsCOOLING UNIT FAN UNIT

State of the LEDs located on the front panel of the Fan Unit:

Note

The Test Lamp button re-lights (during 20 seconds) all the LEDs which have turnedto sleep mode, to detect any eventual LED malfunction.

YES---

NOPress the lamp test: if both LEDs turn on, then

YESIf both LEDs remain on after the end of the self-test, then

NOPress the lamp test: if both LEDs turn on, then

Faulty Module

ActionRed LEDGreen LED


V14.00/EN June 200354


BSC e3/TCU e3 Cabling 1 - SAI Frame

(*) the optional HUBs can be installed inside or outside the SAI.

SAI BSC e3 Cabinet

HARDWARE OVERVIEW

The SAI (Service Area Interface) is a 30 cm-wide auxiliary frame attached at the left side of the BSC e3/TCU e3 frame. It enables front access to the PCM cabling.

The SAI cabinet can host:

in the TCU e3: up to 8 CTUs (Cable Termination Unit)

In the BSC e3: up to 6 CTUs + 2 optional HUBs.

The CTU module is a frame assembly which provides the physical interface (PCM E1/T1 links) between the TIM module of the LSA-RC and the other BSS products (copper concentration).

It is split as follows:

1 x CTB (Cable Transition Board) which is the backplane,

7 x CTMx (Cable Transition Modules) that are either:

CTMP, E1, twisted pair, Z=120 Ohms: processes 3 spans.

CTMC, E1, coax, Z=75 Ohms: processes 3 spans.

CTMD, T1, twisted pair, Z=100 Ohms: processes 4 spans.

For local maintenance purposes, the TML can be plugged into a HUB of the BSC e3.

Note

The CTU provides the ability for each E1 or T1 PCM to be set in loopback mode, in order to help the diagnostic of PCM faults.


V14.00/EN June 200355



2 - BSC e3 Optical Fiber CablingZoom on optical Cabling

Opt

ical

Mul

timod

e Fi

bers

ATM-SW

Modules

In the CN

ATM-RM

Modules

In the IN

TX

RX

RX

TX

This figure shows how to connect the OC-3c optical multi-mode fibers.

They are used to connect the ATM backplane in the Control Node via the ATM -SW module to the S-links backplane in the Interface Node via the ATM-RM module.

Notes

The optical link goes from the TX (ATM -SW in the CN) to the RX (ATM-RM in the IN),

The RX (ATM -SW in the CN) goes to the TX (ATM-RM in on the IN).

An optical attenuator must be inserted on the optical fiber at the output of the ATM -SW module.

Reference of the Optical Fiber: NTQE0607.


V14.00/EN June 200356


BSC e3/TCU e3 Cabling 3 - PCM Cabling between SAI and LSA-RC

CTMXCTMXCTMXCTMXCTMXCTMXCTMX

TM

UF

ILL

ER

TM

UT

MU

MM

S p

riva

teM

MS

sha

red

FIL

LE

RF

ILL

ER

MM

S s

hare

dM

MS

pri

vate

TM

UT

MU

TM

UT

MU

SIM

TM

UF

ILL

ER

TM

UT

MU

OM

UA

TM

-SW

AT

M-S

W

TM

UT

MU

TM

UT

MU

SIM

OM

U

Control node

Cooling unit

Air f ilter

IEM

TIM

IEM

IEM

TIM IE

MC

EM

CE

M8K

-RM

8K-R

MF

ILL

ER

IEM

TIM IEM

SIM

FIL

LE

RIE

MT

IM IEM

FIL

LE

RIE

M

IEM

TIM IE

MF

ILL

ER

SIM

Interface node

Cooling unit

Air f ilter

PCIU


CTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMX

AT

M-R

MA

TM

-RM

TIM IEM

LSA-RC5

LSA-RC0

LSA-RC4

LSA-RC1

LSA-RC2

LSA-RC3

BSC e3

5

4

3

2

1

0

1 3

405

2

Upper NodeLower Node


PCIU



CTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMX

Transcoder node

Cooling unit

Air f ilter

TR

MT

RM

TR

MIE

MT

IM IEM

CE

MC

EM

TR

MT

RM

TR

MT

RM

TR

MT

RM

SIM

LSA-RC0

FIL

LE

RIE

MT

IM IEM

FIL

LE

RIE

M

IEM

TIM IE

MT

RM

SIM

TR

MT

RM

TIM IEM

LSA-RC1

LSA-RC2

LSA-RC3

Transcoder node

Cooling unit

Air f ilter

TR

MT

RM

TR

MIE

MT

IM IEM

CE

MC

EM

TR

MT

RM

TR

MT

RM

TR

MT

RM

SIM

LSA-RC0

FIL

LE

RIE

MT

IM IEM

FIL

LE

RIE

M

IEM

TIM

IEM

TR

MS

IM

TR

MT

RM

TIM

IEM

LSA-RC1

LSA-RC2

LSA-RC3

TCU e3

5

4

3

2

1

0

6

7

1 2 3

0

1 2 3

0

Note: For both BSC e3 and TCU e3, all the cables linking the CTUs and the LSA-RCshave the same length (1.66 meter).

BSC e3

In the case of a BSC e3, the SAI includes a maximum of 6 CTUs which are numbered from the top to the bottom: 0, 1, 2, 3, 4, 5.

Each CTU must be connected to the relevant LSA-RC as follows:

CTU 0 < -- > LSA 1

CTU 1 < -- > LSA 2

CTU 2 < -- > LSA 3

CTU 3 < -- > LSA 5

CTU 4 < -- > LSA 0

CTU 5 < -- > LSA 4.

TCU e3

In the case of a TCU e3, the SAI includes a maximum of 8 CTUs; the 4 upper CTUs are dedicated to the upper transcoder node dual-shelf, the 4 lower CTUs are dedicated to the lower transcoder node dual-shelf. They are numbered from the top to the bottom: 0, 1, 2, 3, 4, 5, 6, 7.

Each CTU must be connected as follows:

CTU 0 < -- > LSA 1-up CTU 4 < -- > LSA 1-down



CTU 3 < -- > LSA 0-up CTU 7 < -- > LSA 0-down.


V14.00/EN June 200357



Tx

Rx

CTU

Tx signals62-pin connector

Rx signals62-pin connector

M u l t i p l e

Span

Alarms

IEMTIM

M u l t i p l e

Span

Alarms

IEM

LSA-RC

4 - PCM Cabling: connection LSA-RC/CTU

Both cables are identical. Each of them is symmetrical (its two connectors are identical -62-pin connectors).

Both cables have to be connected as follows:

Tx signals: upper connector of the CTU with the upper connector of the front panel of the TIM module.

Rx signals: lower connector of the CTU with the lower connector of the front panel of the TIM module.

Note

The Rx cable must be connected before the Tx cable.


V14.00/EN June 200358




TM

UF

ILL

ER

TM

UT

MU

MM

S p

riva

teM

MS

sha

red

FIL

LE

RF

ILL

ER

MM

S s

hare

dM

MS

pri

vate

TM

UT

MU

TM

UT

MU

SIM

TM

UF

ILL

ER

TM

UT

MU

OM

UA

TM

-SW

AT

M-S

W

TM

UT

MU

TM

UT

MU

SIM

OM

U

Control Node

Cooling unit

Air filter

IEM

TIM

IEM

IEM

TIM IEM

CE

MC

EM

8K-R

M8K

-RM

FIL

LE

RIE

MT

IM IEM

SIM

FIL

LE

RIE

MT

IM IEM

FIL

LE

RIE

M

IEM

TIM IEM

FIL

LE

RS

IM

Interface Node

Cooling unit

Air filter

PCIU



AT

M-R

MA

TM

-RM

TIM IEM

LSA-RC5

LSA-RC0

LSA-RC4

LSA-RC1

LSA-RC2

LSA-RC3

BSC e3

CTMx5CTMx4

CTMx6

CTMx1CTMx0

CTMx2CTMx3

CTU 4

PCM

5 - PCM Cabling: CTU connections

The number of the CTM in the SAI depends on the number of the given LSA-RC in the shelf.

The numbering of the CTM ports goes from the left to the right and from the bottom to the top: from 0 to 20 for E1 and from 0 to 27 for T1.

Example:

The PCM nb 0 from the LSA-RC nb 0 is linked to the CTU nb 0, CTM nb 0, port nb 0


V14.00/EN June 200359



6 - Optional Hub: Bay Stack 250

A Hub is an active node which regenerates the Ethernet signal: it is the central switch in a twisted pair network.

The equipment that is used is the BayStack 250 (Nortel Equipment).

BayStack 250 Series

The BayStack 250 is a standard stackable Ethernet Hub that contains:

12 RJ45 ports for twisted pair 10/100 Base T conductors. It is possible to connect up to 5 Hubs together obtaining a 60-port logical Hub.

One LED display: Each port has two LEDs to indicate its port status.

One switch for connection to an Ethernet switch or another Hub.

Notes

Each port is a repeater.

The ports can be active simultaneously.

A slot is available for a management module. Two chained Hubs make a logical Hub.


V14.00/EN June 200360


BSC e3/TCU e3 Cabling 7 - BSC e3 and TCU e3 Alarms & - 48 V dc Cabling

For the BSC e3.

The figure shows how to connect the internal 48 V dc and alarm cables between:

the PCIU

and the four SIM modules located in the Control Node and the Interface Node.

The internal 48 V dc and the alarm links are distributed:

for the Control Node: from the SIM modules to the OMU modules and the other modules via the ATM backplane.

for the Interface Node: from the SIM modules to the CEM modules and the other modules via the Slink backplane.

For the TCU e3.

The figure shows how to connect the internal 48 V dc and alarm cables between:

the PCIU

and the four SIM modules located on both Transcoder Nodes.

The internal 48 V dc and the alarm cables are distributed on each Transcoder Node from the SIM modules to the CEM modules and each RM via the S-link backplane.


V14.00/EN June 200361


BSC e3/TCU e3 Cabling 8 - BSC e3 Alarm Cabling

The bold lines show the alarm external way.

The regular lines show

the alarm internal ways on the back panel.

Alarm links

For the BSC e3 Frame.

The figure shows the internal and external alarm links for the frame assembly of the BSC e3 cabinet.


V14.00/EN June 200362


BSC e3/TCU e3 Cabling 9 - TCU e3 Alarm Cabling

The bold lines show the alarm external way.

The regular lines show

the alarm internal ways on the back panel.

Alarm links

For the TCU e3 Frame.

The figure shows the internal and external alarm links for the frame assembly of the TCU e3 cabinet.


V14.00/EN June 200363


BSC e3/TCU e3 Fuses

FOR THE POWER SUPPLY BOX

1 main breaker (32 A) for the whole site

4 breakers or fuses (32 A) per cabinet.

FOR EACH BOARD

1 fixed fuse

Fuses

The power supply box is equipped with:

1 main breaker for the whole site

and 4 breakers or fuses (32 A) for the cabinet.

The general breaker/fuse value is the general value on the clients site, which depends on the on-site equipments.

The following boards house a fixed fuse to protect each component:

OMU,

TMU,

MMS,

CEM,

ATM-RM,

8K-RM,

IEM (from the LSA-RC),

TRM.


V14.00/EN June 200364


Section 5Section 5

BSC e3 BSC e3 andand TCU e3 Hardware TCU e3 Hardware FeaturesFeatures andand ConfigurationsConfigurations


V14.00/EN June 200365


Objectives


Describe the hardware features of the BSC e3 and TCU e3

Know about BSC e3 and TCU e3 configuration.


V14.00/EN June 200366


Contents

Hardware Features

Configurations


V14.00/EN June 200367


Hardware Features

Operating Temperature(long term)

+ 40 C

+ 5 C

Maximum Relative humidity

85%

5%

570 kgMaximum Weight

Weight

NB: dimensions are given in mm

1 - Main Characteristics

960

600

2200

BSC e3

Control Node

Interface Node

Service Area

Interface

2200

TCU e3

Transcoding Node

Transcoding Node

960

600

Transcoding Node

Transcoding Node

Service Area

Interface

The BSC e3 cabinet is a one-cabinet equipment made of 3 parts:

2 main frames hosting the Control Node and the Interface Node

a PCM cabling frame, called SAI (Service Area Interface).

The TCU e3 cabinet is a one-cabinet equipment made of 3 parts:

the 2 main frames hosting the Transcoding Nodes

a PCM cabling frame, called SAI (Service Area Interface).

The hardware design allows a complete front access to the equipment (SAI), including fans, power supplies, and PCM cabling.

External cabling from below and above are supported.

There are 2 cooling units in each cabinet. Each cooling unit consists of 4 replaceable fans and air filter, and a grill assembly.

The BSC e3/TCU e3 is designed to operate in clean rooms. It must be anchored to the floor, not to the wall. The minimum floor resistance must be 1000 kg/m2.

The cabinet complies with ETSI standards.


V14.00/EN June 200368


Hardware Features

2 - Filler Module

Front

Panel

View

Filler Module MAIN FUNCTION: FILL IN THE UNUSED SLOTS

The Filler Module is an empty module container which can be used inside all the Nodes of the BSC e3/TCU e3 which are not filled with any other module.

It manages the following functions:

To maintain Electro Magnetic Interference (EMI) integrity,

To maintain shelf airflow patterns to ensure proper cooling.

External Interfaces on the Front Panel: NA

Board Location: the Filler Module can occupy any slot that does not house a module.

Note

Caution: If one or more slots remain empty on a powered shelf, then TCU e3 or BSC e3 frames may be damaged. These fillers ensure:

A good equipment cooling

A proper EMI shielding.


V14.00/EN June 200369


BSC e3 and TCU e3 Configurations

1 - Min and Max Configurations

BSC e3 and TCU e3 dimensioning

Erlang

TRX

BTS

Cells

LAPD links

E1 / T1 PCM (BSC e3)

E1 / T1 PCM (TCU e3)

A interface circuits (TCU e3)

A interface circuits (BSC e3)

SS7 links

Max

3000

1000

500

600

600

126 / 168

84 / 112

1944

3112

16

Min

600

360

120

360

120

42 / 56

21 / 28

200

620

3

This table gives the minimum and maximum possible configurations for the BSC e3 and TCU e3 cabinets.

BSC e3 configuration:

The minimum is a 600 Erlang BSC e3 with 3 TMU modules (2+1 for redundancy) and 2 LSAs (42 E1 or 56 T1 PCMs).

The maximum is a 3000 Erlang BSC e3 with 14 TMU modules (12+2 for redundancy) and 6 LSAs (126 E1 or 168 T1 PCMs). In this case, the BSC e3 requires 2 TCU e3 cabinets .

TCU e3 configuration:

The minimum is a 200 Erlang TCU e3 (in the case of EFR) with 2 TRM modules (1+1 for redundancy), 1 LSA (21 E1 or 28 T1 PCMs).

The maximum is a 1800 Erlang TCU e3 with 10 TRM modules (9+1 for redundancy) and 4 LSAs (84 E1 or 112 T1 PCMs) in each TCU e3 shelf.

Notes

Between these minimum and maximum configurations, different configurations can be offered. Nevertheless, in the TCU e3 cabinets, the number of TRMs and LSAs is directly linked to the A Interface capacity.

Moreover, some product engineering rules have been defined to avoid inconsistency between the number of TMUs and the number of LSAs.


V14.00/EN June 200370



Typical Configurations

BSC e3 600 E 1500 E 2400 E 3000 ETMU 2+1 5+1 8+2 10+2LSA 2 3 5 6

Nb of LAPD 120 300 480 600Nb of E1 42 63 105 126Nb of T1

56 84 140 168

TCU e3 600 E 1200 E 1800 ETRM 3+1 6+1 9+1LSA 2 3 4

200 E1+11

42 63 84Nb of E1 21

56 84 112Nb of T1 28

X (active) + X (redundant) = Total Number of Boards

2 - BSC e3 & TCU e3 Typical Configurations

Nortel Networks has defined some market model configurations (rural, semi-urban, urban), and optional extension kits (comprised of TMU, TRM & LSA) in order to help the operators select the appropriate number of modules.

A rural type of configuration with

a relatively low number of TMUs (low traffic capacity)

a maximum number of LSAs (because many small BTSs used for coverage need to be connected).

An urban type of configuration with

a high number of TMUs (high traffic capacity)

a relatively low number of LSAs (because BTSs have many TRXs per cell, and there are relatively few BTSs to be connected to the BSC).

Note: The BSC can have a maximum of 14 TMU modules (12+2) for very tough traffic profiles.


V14.00/EN June 200371



3 - BSC e3 Configuration Examples

BSS Configuration

Nb of BTSsBSC capacity (Erl)Nb of TRXsTMULSAAbis E1 / T1

Ater E1 / T1

Agprs E1 / T1

S111

2001300600

66

115 / 150

11 / 18

10 / 14

S222

1253000750126

100 / 126

26 / 42

7 / 10

BSCe3

Documents

oml14 bsc e3

tcu e3 architecture

tcu e3 startup

tml e3 equipment

tcu e3 troubleshooting

tcu e3 board description

tcu e3 module replacement

property of nortel networks