Hughes Network Systems GMH2000 Manual

Subsidiary of
Hughes Aircraft Company
HUGHES
NETWORK SYSTEMS
™
Base Station Controller
Installation and Maintenance Manual
HNS 8018653
April 11, 1994
Version 1.1
Hughes Network Systems, Inc.
11717 Exploration Lane
Germantown, Maryland 20876
[phone]

Copyright © 1992, 1993, 1994, Hughes Network Systems, Inc.

8018653 1.1 Contents • iii
Contents
About this manual ................................................................................ xi
1 Introduction................................................................................. 1-1
1.1 Mobile switching center...................................................... 1-2
1.2 Operations and maintenance center .................................... 1-3
1.3 Base station controller......................................................... 1-4
1.4 Base transceiver station....................................................... 1-4
Antennas .......................................................................... 1-5
RFMC .............................................................................. 1-5
CUMC.............................................................................. 1-5
1.5 Mobile station ..................................................................... 1-6
M6100 digital/analog cellular telephone ......................... 1-6
Transceiver unit ............................................................... 1-7
2 Installing BSC hardware............................................................ 2-1
2.1 Materials inspection............................................................ 2-1
2.2 Tools and materials required for installation ...................... 2-5
2.3 Unpacking the BSC rack..................................................... 2-6
Unpacking a configuration #1 shipment.......................... 2-7
Unpacking a configuration #2 shipment........................ 2-15
2.4 Anchoring multiple BSC racks ......................................... 2-18
2.5 Installing cable ladders...................................................... 2-21
Installing horizontal cable ladders................................. 2-21
Installing vertical cable ladders ..................................... 2-21
2.6 Installing BSC input power and ground cables................. 2-21
2.7 Installing the external LAN cable..................................... 2-27
Floor access installation procedure................................ 2-28
Ceiling access installation procedure............................. 2-29
2.8 Installing E1/T1 trunk cables............................................ 2-29
2.9 Activating the BSC rack ................................................... 2-37
2.10 Installing BSC modules..................................................... 2-37
Installing T1 interface modules ..................................... 2-39
Installing E1 interface modules ..................................... 2-41
Installing control processor modules............................. 2-42
Installing CPMs in GRP slots................................... 2-42
Installing CPMs in CCP slots................................... 2-42
Installing CPMs in CAP slots................................... 2-43
Installing switching transcoder modules ....................... 2-44
Installing blank panels ................................................... 2-44
2.11 Assigning BSC chassis identification codes..................... 2-46
3Activation and shutdown............................................................ 3-1
3.1 Activation............................................................................ 3-1
BSC module LED codes.................................................. 3-2
3.2 BSC rack shutdown............................................................. 3-4
3.3 BSC chassis assembly shutdown ........................................ 3-4
3.4 Restarting the BSC rack...................................................... 3-5
4Troubleshooting .......................................................................... 4-1

iv • Contents 8018653 1.1
4.1 Fault analysis procedure..................................................... 4-1
4.2 Troubleshooting flowcharts................................................ 4-2
4.3 Startup diagnostics procedure........................................... 4-11
5Maintenance................................................................................ 5-1
5.1 Periodic maintenance.......................................................... 5-1
5.2 Electrostatic discharge control ........................................... 5-2
5.3 Required tools for maintenance.......................................... 5-2
5.4 Replacement procedures..................................................... 5-2
Replacing BSC circuit modules...................................... 5-4
5.5 Standard HNS return and repair procedure ........................ 5-6
Factory return procedure................................................. 5-6
Domestic Returns....................................................... 5-7
International Returns................................................. 5-7
AAcronyms and abbreviations..................................................... A-1

8018653 1.1 Figures • v
Figures
1-1 The GMH 2000 digital wireless communications
system architecture.................................................................. 1-1
1-2 Alcatel 1000 System 12 distributed switching
system (typical)....................................................................... 1-3
1-3 Operations and Maintenance Center......................................... 1-3
1-4 BSC equipment rack ................................................................. 1-4
1-5 BTS stacks (typical).................................................................. 1-5
1-6 M6100 telephone and transceiver unit...................................... 1-6
2-1 BSC rack shipping configurations ............................................ 2-6
2-2 Restraint band, cap, and sleeve removal.................................... 2-7
2-3 Moisture barrier removal .......................................................... 2-8
2-4 Foam brace removal.................................................................. 2-9
2-5 Sleeve brace and bracket removal............................................. 2-9
2-6 Bracket removal...................................................................... 2-10
2-7 Moving the BSC rack from pallet to pallet truck.................... 2-11
2-8 BSC rack leveling feet locations............................................. 2-12
2-9 Verifying that the BSC rack is plumb..................................... 2-13
2-10 Spacing between multiple BSC racks ..................................... 2-14
2-11 Restraint band removal ........................................................... 2-15
2-12 Moisture barrier removal ........................................................ 2-16
2-13 Connecting the bottom frames of the BSC racks together...... 2-19
2-14 Connecting the top frames of the BSC racks together............ 2-20
2-15 Power cable and ground cable connections ............................ 2-22
2-16 PDU front panel switches........................................................ 2-23
2-17 PDU terminal block slot locations .......................................... 2-24
2-18 Terminal block cable clamp screw location............................ 2-25
2-19 Grounding the BSC rack......................................................... 2-26
2-20 BSC/BCP LAN repeater connection....................................... 2-27
2-21 Connector J83 location............................................................ 2-28
2-22 E1/T1 module locations .......................................................... 2-29
2-23 E1/T1 trunk cable connectors ................................................. 2-30
2-24 Cable routing........................................................................... 2-36
2-25 BSC chassis assemblies........................................................... 2-38
2-26 BSC chassis assembly circuit module slot designations......... 2-39
2-27 Ejector/injector operation........................................................ 2-40
2-28 Module front panel.................................................................. 2-40
2-29 Front panel DIP switches setting for SUDs............................ 2-42
2-30 Blank panel ............................................................................. 2-45
2-31 Numbering BSC racks and BSC chassis assemblies............... 2-46
2-32 BSC chassis ID setting............................................................ 2-47
3-1 BSC module front panel LED status display ............................ 3-2
4-1 Typical malfunction data sheet ................................................. 4-1
5-1 Circuit module locations........................................................... 5-3
5-2 Front panel DIP switches setting for SUDs.............................. 5-4
5-3 Ejector/injector operation.......................................................... 5-5

vi • Figures 8018653 1.1

8018653 1.1 Flowcharts • vii
Flowcharts
4-1 No power to BSC rack.............................................................. 4-3
4-2 No power to a single BSC chassis.............................................. 4-4
4-3 E1 or T1 module failed SUDs................................................... 4-5
4-4 CPM or STM failed SUDs........................................................ 4-5
4-5 You are unable to download the online software...................... 4-6
4-6 You are unable to bring the CCP online ................................... 4-7
4-7 You are unable to establish T1 lines......................................... 4-8
4-8 You are unable to establish E1 lines......................................... 4-9
4-9 The STMs fail to come online and stay online ....................... 4-10

viii • Flowcharts 8018653 1.1

8018653 1.1 Tables • ix
Tables
2-1 Initial BSC rack (BS-INIT) components ...................................... 2-2
2-2 Expansion BSC rack installation kit (BS-10-EXP)
components................................................................................. 2-3
2-3 BSC modules ................................................................................ 2-4
2-4 BSC rack components................................................................... 2-5
2-5 Input power cable connections ................................................... 2-26
2-6 Trunk cable J79, E1 RVS listing by cable connector
pin number ................................................................................ 2-31
2-7 BSC chassis assembly slot designations..................................... 2-39
2-8 BSC chassis assembly identification codes ................................ 2-48
3-1 Normal operating configuration for BSC rack switches
and indicators.............................................................................. 3-1
3-2 BSC module LED status display codes ........................................ 3-3
3-3 BSC rack power control................................................................ 3-4
5-1 BSC circuit module status LED readouts ..................................... 5-5

x • Tables 8018653 1.1

8018653 1.1 About this manual • xi
About this manual
The Base Station Controller Installation and Maintenance Manual
contains the information necessary to install and maintain the base
station controllers used in the GMH 2000 digital cellular communica-
tions network. This document describes installing the base station
controller (BSC) racks only; all other hardware must already be installed
(refer to the GMH 2000 Base Station Controller Site Preparation
Specifications for more information).
Audience This manual is written for the GMH 2000-trained technician. BSC
equipment is complex and precludes service by untrained personnel.
Structure This manual contains the following chapters and appendices:
• Chapter 1 provides a general description of the GMH 2000 system.
•Chapter 2 contains the BSC installation procedures.
•Chapter 3 describes activating and deactivating the BSC.
• Chapter 4 covers troubleshooting.
• Chapter 5 covers periodic maintenance, describes measures for
protecting personnel and equipment from electrostatic discharge,
and contains the procedures for replacing failed equipment.
•Appendix A lists the abbreviations and acronyms used in this
manual.
Assumptions Installation and maintenance procedures in this manual are based on the
following assumptions:
•All procedures will be performed by qualified service personnel
who are familiar with the GMH 2000 architecture and configura-
tion, BSC hardware elements, and terminology.
•Personnel responsible for equipment installation and maintenance
will have access to the customer’s site configuration documenta-
tion. This documentation provides information needed to install
and to configure the BSC at a particular site for operation within
the digital cellular network.

xii • About this manual 8018653 1.1
•The installation site has been prepared in accordance with the
instructions contained in the GMH 2000 Base Station Controller
Site Preparation Specifications.
•All equipment to be installed is available at the installation site.
•All special equipment, tools, and test equipment required for
installation and maintenance are available.
Conventions used in
this document
Notes, cautions, and warnings, defined as follows, are used throughout
this manual to help you become familiar with possible safety or
equipment hazards.
Note
Presents additional information or interesting
sidelights.
Caution
Indicates a procedure that may result in equipment
damage if not strictly observed.
WARNING
Indicates a procedure that may result in personal
injury if not strictly observed.
Version record Version Date Description
1.0 09/24/93 Document released.
1.1 04/11/94 Editing changes made throughout
document along with some
nomenclature changes.

8018653 1.1 About this manual • xiii
Related publications The following documentation/publications provide additional
information about the GMH 2000 digital cellular communications
network.
Publication Number
GMH 2000 BSC Site Planning Guide 8018531
GMH 2000 BSC Site Survey Worksheets 8018628
GMH 2000 BSC Site Configuration Worksheets 8018627
GMH 2000 Base Station Subsystem (BSS) Description 8018529
GMH 2000 Base Station Subsystem (BSS) Operations
and Maintenance Manual 8018530
GMH 2000 Local Maintenance Terminal (LMT)
Operator’s Reference Manual 8019007
GHM 2000 BSC Site Preparation Specifications

xiv • About this manual 8018653 1.1

8018653 1.1 Introduction • 1-1
Chapter 1
Introduction
The GMH 2000™digital wireless communications system provides high-
quality telephone service to subscribers in mobile and fixed
environments. Figure 1-1 illustrates the GMH 2000 cellular system
architecture.
OMC
MSC
E1 TRUNK CIRCUIT E1 TRUNK CIRCUIT
T1 TRUNK
CIRCUIT
ETHERNET LINK
PSTN
BTS
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NETWORKSYSTEMS
BSC BSC
BTS
MOBILE
STATIONS
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HUGHES
NETWORKSYSTEMS
BTS
T1 TRUNK
CIRCUIT
T1 TRUNK
CIRCUIT
SUBSCRIBER
SETS
MSU
Figure 1-1. The GMH 2000 digital wireless communications system architecture
The terms GHM 2000, M6100, and E-TDMAare trademarks of Hughes Network Systems, Inc. (HNS)

1-2 • Introduction 8018653 1.1
The GMH 2000 system supports the following cellular industry
standards:
•Electronic Industry Association (EIA)/Telecommunications Indus-
try Association (TIA) Interim Standard-54 (IS-54). IS-54 Analog is
the analog standard for mobile telecommunications, it provides
one voice circuit per single RF channel.
•EIA/TIA IS-54. IS-54 Digital is the digital standard for
telecommunications; it provides up to three time-division multiple-
access (TDMA) voice circuits per RF channel.
•Extended-TDMA (E-TDMA™). Developed by HNS, E-TDMA
provides 10 to 15 voice circuits per RF channel.
As shown in figure 1-1, the GMH 2000 cellular system architecture
contains the following subsystems:
•Mobile switching center (MSC)
•Operations and maintenance center (OMC)
•Base station controller (BSC)
•Base transceiver station (BTS)
•Mobile station (MS)/fixed stations (MultiSubscriber Units, or
MSUs)

8018653 1.1 Introduction • 1-3
1.1
Mobile switching center
The MSC (see figure 1-2) contains an Alcatel 1000 System 12
distributed switching system that interfaces (via E1 trunk circuits) with
one or more base station controllers, providing connections between
them and the public switched telephone network (PSTN).
The MSC processes all requests for calls, controls access to system
features, and performs all switching functions. It controls subscriber
functions of registration, authentication, and records management using
the home location register (HLR) and visitor location register (VLR).
The HLR is a permanent database of all subscribers that is integrated into
a national network of subscriber databases to improve call delivery and
prevent fraud.
The VLR is a semi-permanent, fast-access database that contains sub-
scriber ID, location, and feature information for those users who are, or
recently have been, active in the service area.
Figure 1-2. Alcatel 1000 System 12 distributed switching system (typical)

1-4 • Introduction 8018653 1.1
1.2
Operations and
maintenance center
The operations and maintenance center, shown in figure 1-3, provides
user-friendly windows and screens that help the operator support opera-
tion, administration, and maintenance activities. Among the features
provided are the ability to remotely configure BTS cell frequencies,
download software to BSCs, re-route trunk circuits, manage subscriber
records, diagnose and respond to system faults, and collect and analyze
performance statistics.
Figure 1-3. Operations and Maintenance Center

8018653 1.1 Introduction • 1-5
1.3
Base station controller
The BSC (shown in figure 1-4) is responsible for controlling one or more
base transceiver stations (via T1 trunk circuits) and providing connec-
tions between them and the MSC via E1 trunk circuits. The BSC
performs call processing and hand-off procedures together with audio
compression and decompression.
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HughesAircraft Company
HUGHES
NETWORKSYSTEMS
Figure 1-4. BSC equipment rack
1.4
Base transceiver station
The BTS includes antennas, transmitters, and receivers that communicate
with the mobile stations, and digital multiplex equipment that deliver
audio traffic (via T1 links) to the BSC for further processing.
The BTS includes the following equipment:
•Antennas: omnidirectional and sectorized
•Radio frequency modular cabinets (RFMCs)
• Channel unit modular cabinets (CUMCs)

1-6 • Introduction 8018653 1.1
Antennas Each BTS site has a single transmit antenna and two receive antennas.
There are several antenna types and configurations that are chosen based
on environmental, regulatory, and site-specific requirements. Generally,
the omnidirectional antennas used are dipole collinear array types; the
sectorized antennas are available as panel or collinear arrays.
Subsidiaryof
HughesAircraftCompany
HUGHES
NETWORKSYSTEMS
Subsidiaryof
HughesAircraftCompany
HUGHES
NETWORKSYSTEMS
Subsidiaryof
HughesAircraftCompany
HUGHES
NETWORKSYSTEMS
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HughesAircraftCompany
HUGHES
NETWORK SYST EMS
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Hughes
AircraftCompany
HUGHES
NETWORK SYSTEMS
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HughesAircraftCompany
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NETWORKSYSTEMS
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HughesAircraftCompany
HUGHES
NETWORK SYSTEMS
CUMC
STACK
RFMC
STACK
Figure 1-5. BTS stacks (typical)
RFMC RFMC equipment (shown in figure 1-5) perform the following functions:
•Amplify the RF carrier from one (or more) CUMCs.
• Combines high power RF carriers from the amplifiers and inter-
faces to the transmit antenna.
CUMC CUMC equipment transmit functions include the following:
•Perform baseband processing and transmit filtering of the digitized
transmit voice signal based on the operational mode (AMPS,
TDMA, or E-TDMA).
•Modulate, upconvert, and amplify the transmit carrier before send-
ing the signal to the RFMC.