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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
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 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
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 iv
Volume Composition
No. Title Reference Version/Edition
1 OML14 BSC e3 and TCU e3 Local Maintenance
PE/TRD/CN/4273 14.00/EN
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 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.
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 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
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 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
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 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
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 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
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 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
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 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
BSCe3 and TCUe3 Local Maintenance
V14.00/EN June 20031
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.
Section 1Section 1
IntroductionIntroduction
BSCe3 and TCUe3 Local Maintenance
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.
BSCe3 and TCUe3 Local Maintenance
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3NORTEL NETWORKS CONFIDENTIAL
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.
BSCe3 and TCUe3 Local Maintenance
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4NORTEL NETWORKS CONFIDENTIAL
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
PE/CDC/DD/0026CD-ROM of
BSS Parameters User Guide+
PE/CDC/DD/0083CD-ROM of
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).
BSCe3 and TCUe3 Local Maintenance
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5NORTEL NETWORKS CONFIDENTIAL
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
BSCe3 and TCUe3 Local Maintenance
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6NORTEL NETWORKS CONFIDENTIAL
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
BSCe3 and TCUe3 Local Maintenance
V14.00/EN June 20037
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.
Section 2Section 2BSC e3 and TCU e3 BSC e3 and TCU e3
Functional ArchitectureFunctional Architecture
BSCe3 and TCUe3 Local Maintenance
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8NORTEL NETWORKS CONFIDENTIAL
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.
BSCe3 and TCUe3 Local Maintenance
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9NORTEL NETWORKS CONFIDENTIAL
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
BSCe3 and TCUe3 Local Maintenance
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10NORTEL NETWORKS CONFIDENTIAL
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.
BSCe3 and TCUe3 Local Maintenance
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11NORTEL NETWORKS CONFIDENTIAL
BSS Architecture
BSC e3
AterA
MS
AirTCU e3
TCU 1
TCU 0
ServiceAreaInterface
TCP/IPEthernet
MSC/HLR
DMS
Remote RACE client
PSTN
ServiceAreaInterface
Control
Node
Interface Node
ServiceAreaInterface
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).
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12NORTEL NETWORKS CONFIDENTIAL
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.
BSCe3 and TCUe3 Local Maintenance
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13NORTEL NETWORKS CONFIDENTIAL
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.
BSCe3 and TCUe3 Local Maintenance
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14NORTEL NETWORKS CONFIDENTIAL
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).
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15NORTEL NETWORKS CONFIDENTIAL
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
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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).
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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.
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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).
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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.
Section Section 33BSC e3 BSC e3 andand TCU e3 TCU e3 BoardBoard DescriptionDescription
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Objectives
After completion of this section, the students will be able to:
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.
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Contents
Control Node Boards
Interface Node Boards
Transcoding Node Boards
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Control NodeControl Node
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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.
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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.
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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.
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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.
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Control Node
5 - Memory Mass Storage
Mirrored Shared Disks
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
Mirrored Shared Disks
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
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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.
External Interfaces on the Front Panel:
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
StatusGreen LEDRed LED
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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.
External Interfaces on the Front Panel:
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
StatusGreen LEDRed LED
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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).
External Interfaces on the Front Panel:
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
StatusGreen LEDRed LED
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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
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Interface NodeInterface Node
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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.
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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
Dual Shelf 00 Shelf 00
Dual Shelf 00 Shelf 01
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).
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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,
External Interfaces on the Front Panel:
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
StatusGreen LEDRed LED
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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.
External Interfaces on the Front Panel:
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
StatusGreen LEDRed LED
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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.
External Interfaces on the Front Panel:
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
Module active and Unlocked
Lit Unlit
StatusGreen LEDRed LED
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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).
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Interface Node
6 - LSA-RC Module 2/3
Front Panel View for PCM
T1 links
Signal Failure Indication
Red LED blinks
Up and down Buttons
2
1
3
4
5
Signal Failure Indication
Red LED blinks
Up and down Buttons
Front Panel View for PCM
E1 links
62-pin Sub D Connector
to SAI
62-pin Sub D Connectorfrom SAI
External Interfaces on the Front Panel:
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
Module active and Unlocked
LitUnlit
StatusGreen LEDRed LED
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Interface Node
6 - LSA-RC Module 3/3
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
Front Panel View for PCM
T1 links
Front Panel View for PCM
E1 links
Signal Failure Indication
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.
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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
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TranscodingTranscoding NodeNode
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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.
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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
Dual Shelf 01 Shelf 00
Dual Shelf 01 Shelf 01
Transcoding Node no. 00
Dual Shelf 00 Shelf 00
Dual Shelf 00 Shelf 01
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).
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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)
External Interfaces on the Front Panel:
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:
Module active and Unlocked
LitUnlit
StatusGreen LEDRed LED
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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
BSCe3 and TCUe3 Local Maintenance
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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.
Section 4Section 4
ThermicThermic, , EnergeticEnergetic andand CablingCabling AspectsAspects
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Objectives
After completion of this section, the students will be able to:
Describe the power supply, alarms and cooling system
Understand the role of the SAI
Identify BSC e3/TCU e3 cabinet cables.
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Contents
Power Supply & Alarm Systems
Cooling System
BSC e3/TCU e3 Cabling
Fuses
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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.
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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.
External Interfaces on the Front Panel:
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
StatusGreen LEDRed LED
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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.
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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
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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.
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BSC e3/TCU e3 Cabling
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.
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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
CTMXCTMXCTMXCTMXCTMXCTMXCTMX
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
CTMXCTMXCTMXCTMXCTMXCTMXCTMX
PCIU
CTMXCTMXCTMXCTMXCTMXCTMXCTMX
CTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMX
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 1 < -- > LSA 2-up CTU 5 < -- > LSA 2-down
CTU 2 < -- > LSA 3-up CTU 6 < -- > LSA 3-down
CTU 3 < -- > LSA 0-up CTU 7 < -- > LSA 0-down.
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BSC e3/TCU e3 Cabling
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.
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58NORTEL NETWORKS CONFIDENTIAL
BSC e3/TCU e3 Cabling
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 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
CTMXCTMXCTMXCTMXCTMXCTMXCTMX
CTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMXCTMX
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
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BSC e3/TCU e3 Cabling
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.
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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.
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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.
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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.
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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.
BSCe3 and TCUe3 Local Maintenance
V14.00/EN June 200364
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.
Section 5Section 5
BSC e3 BSC e3 andand TCU e3 Hardware TCU e3 Hardware FeaturesFeatures andand ConfigurationsConfigurations
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Objectives
After completion of this section, the students will be able to:
Describe the hardware features of the BSC e3 and TCU e3
Know about BSC e3 and TCU e3 configuration.
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Contents
Hardware Features
Configurations
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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.
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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.
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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.
BSCe3 and TCUe3 Local Maintenance
V14.00/EN June 200370
70NORTEL NETWORKS CONFIDENTIAL
BSC e3 and TCU e3 Configurations
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.
BSCe3 and TCUe3 Local Maintenance
V14.00/EN June 200371
71NORTEL NETWORKS CONFIDENTIAL
BSC e3 and TCU e3 Configurations
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