Copyright © Huawei Technologies Co., Ltd. 2011. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior written
consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions
and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice
The purchased products, services and features are stipulated by the contract made between Huawei and the
customer. All or part of the products, services and features described in this document may not be within the
purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,
and recommendations in this document are provided "AS IS" without warranties, guarantees or representations
of any kind, either express or implied.
The information in this document is subject to change without notice. Every effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute the warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.
Address:

Huawei Industrial Base
Bantian, Longgang
Shenzhen 518129
People's Republic of China

Website:

http://www.huawei.com

Email:

support@huawei.com

Issue 05 (2011-05-19)

Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.

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BSC6900 GSM

About This Document

About This Document
Purpose
This document describes how to perform the hardware maintenance tasks after the BSC6900
commissioning, to maintain the hardware operation of the BSC6900. The maintenance tasks
involve powering on/off the BSC6900 cabinet, replacing components, and routine maintenance
tasks such as checking LEDs and monitoring the site environment.

Version
The following table lists the product version related to the document.
Product Name

Version

BSC6900

V900R012C01

Intended Audience
This document is intended for:
l

Network planning engineers

l

System engineers

l

Field engineers

Organization
1 Changes in the BSC6900 GSM Site Maintenance Guide
This chapter describes the changes in the BSC6900 GSM Site Maintenance Guide.
2 Site Maintenance Preparations
This chapter describes the preparations for the BSC6900 site maintenance, including the tool
and spare part preparations.
3 Routine Hardware Maintenance Items
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About This Document

This chapter describes the routine hardware maintenance items of the BSC6900. Different items
require different maintenance methods.
4 Powering On/Off the BSC6900
This chapter describes how to power on and power off the BSC6900. The following is described:
the distribution of the power switches, powering on the BSC6900 cabinet, powering off the
BSC6900 cabinet in a normal situation, and powering off the BSC6900 cabinet in case of
emergencies.
5 Cleaning the Fan Box
This chapter describes how to clean a fan box. To ensure stability and reliability of the equipment,
the maintenance personnel should clean each fan box (including the fan boxes in the service
subracks and the fan boxes in the independent fan subrack) regularly, preferably once every
year.
6 Cleaning and Replacing the Air Filters
This chapter describes how to clean and replace an air filter. The air filter protects the boards
and the BSC6900 from dust. If an air filter is damaged, you must replace it with a new one in
time.
7 Replacing Boards and Modules
This chapter describes how to replace boards and modules in the BSC6900 cabinet, which
involves replacing the boards and modules, acknowledging a successful replacement, and
handling of the faulty boards. Each section provides an estimated time for the replacement of
the board as a reference.
8 Replacing the Cables
This chapter describes how to replace the Ethernet cable, E1/T1 cable, optical cable, clock signal
cable, cable to the alarm box, and power distribution box monitoring cable. This chapter also
describes how to check that the cables are successfully replaced and how to handle the faulty
cables.
9 LEDs on the Boards
This chapter describes the LEDs on the BSC6900 boards.
10 DIP Switches on Components
This chapter describes the DIP switches on the boards and subracks of the BSC6900.
11 BSC6900 Site Maintenance Record
This chapter describes the BSC6900 site maintenance record.

Conventions
Symbol Conventions
The symbols that may be found in this document are defined as follows.

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About This Document

Symbol

Description
Indicates a hazard with a high level of risk, which if not
avoided, will result in death or serious injury.
Indicates a hazard with a medium or low level of risk, which
if not avoided, could result in minor or moderate injury.
Indicates a potentially hazardous situation, which if not
avoided, could result in equipment damage, data loss,
performance degradation, or unexpected results.
Indicates a tip that may help you solve a problem or save
time.
Provides additional information to emphasize or supplement
important points of the main text.

General Conventions
The general conventions that may be found in this document are defined as follows.
Convention

Description

Times New Roman

Normal paragraphs are in Times New Roman.

Boldface

Names of files, directories, folders, and users are in
boldface. For example, log in as user root.

Italic

Book titles are in italics.

Courier New

Examples of information displayed on the screen are in
Courier New.

Command Conventions
The command conventions that may be found in this document are defined as follows.
Convention
Boldface

The keywords of a command line are in boldface.

Italic

Command arguments are in italics.

[]

Items (keywords or arguments) in brackets [ ] are optional.

{ x | y | ... }

Optional items are grouped in braces and separated by
vertical bars. One item is selected.

[ x | y | ... ]

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Description

Optional items are grouped in brackets and separated by
vertical bars. One item is selected or no item is selected.

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BSC6900 GSM

About This Document

Convention

Description

{ x | y | ... }*

Optional items are grouped in braces and separated by
vertical bars. A minimum of one item or a maximum of all
items can be selected.

[ x | y | ... ]*

Optional items are grouped in brackets and separated by
vertical bars. Several items or no item can be selected.

GUI Conventions
The GUI conventions that may be found in this document are defined as follows.
Convention

Description

Boldface

Buttons, menus, parameters, tabs, window, and dialog titles
are in boldface. For example, click OK.

>

Multi-level menus are in boldface and separated by the ">"
signs. For example, choose File > Create > Folder.

Keyboard Operations
The keyboard operations that may be found in this document are defined as follows.
Format

Description

Key

Press the key. For example, press Enter and press Tab.

Key 1+Key 2

Press the keys concurrently. For example, pressing Ctrl+Alt
+A means the three keys should be pressed concurrently.

Key 1, Key 2

Press the keys in turn. For example, pressing Alt, A means
the two keys should be pressed in turn.

Mouse Operations
The mouse operations that may be found in this document are defined as follows.
Action
Click

Select and release the primary mouse button without moving
the pointer.

Double-click

Press the primary mouse button twice continuously and
quickly without moving the pointer.

Drag

vi

Description

Press and hold the primary mouse button and move the
pointer to a certain position.

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Contents

Contents
About This Document...................................................................................................................iii
1 Changes in the BSC6900 GSM Site Maintenance Guide...................................................1-1
2 Site Maintenance Preparations................................................................................................2-1
2.1 Site Maintenance Tool Preparations...............................................................................................................2-2
2.2 Spare Part Preparations...................................................................................................................................2-2

3 Routine Hardware Maintenance Items..................................................................................3-1
3.1 Equipment Room Maintenance Items.............................................................................................................3-2
3.2 Maintaining the Power Supply and Grounding Systems................................................................................3-2
3.3 Cabinet Maintenance Items.............................................................................................................................3-4
3.4 Cable Maintenance Items................................................................................................................................3-5

4 Powering On/Off the BSC6900................................................................................................4-1
4.1 Distribution of Power Switches on the Common Power Distribution Box.....................................................4-2
4.2 Distribution of Power Switches on the High-Power PDB..............................................................................4-4
4.3 Powering On the Cabinet................................................................................................................................4-5
4.4 Powering Off the Cabinet in a Normal Situation............................................................................................4-8
4.5 Powering Off the Cabinet in Emergency Cases..............................................................................................4-9

5 Cleaning the Fan Box.................................................................................................................5-1
6 Cleaning and Replacing the Air Filters.................................................................................6-1
6.1 Position of the Air Filters................................................................................................................................6-2
6.2 Cleaning the Air Filter at the Bottom of the N68E-22 Cabinet......................................................................6-3
6.3 Cleaning the Air Filter on the Inner Side of the Cabinet Door.......................................................................6-5
6.4 Replacing the Air Filters.................................................................................................................................6-6

7 Replacing Boards and Modules...............................................................................................7-1
7.1 Strategy on Replacing Legacy Components in an Upgrade Scenario.............................................................7-4
7.2 Procedure for Replacing a Board....................................................................................................................7-4
7.2.1 Removing a Board..................................................................................................................................7-5
7.2.2 Inserting a Board....................................................................................................................................7-8
7.3 Replacing a DPUa/DPUc/DPUd/DPUf Board..............................................................................................7-10
7.4 Replacing an EIUa Board..............................................................................................................................7-13
7.5 Replacing an FG2a Board.............................................................................................................................7-16
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Contents

7.6 Replacing an FG2c Board.............................................................................................................................7-19
7.7 Replacing a GCUa/GCGa Board...................................................................................................................7-23
7.8 Replacing a GOUa Board..............................................................................................................................7-25
7.9 Replacing a GOUc Board..............................................................................................................................7-29
7.10 Replacing an MDMC Board.......................................................................................................................7-32
7.11 Replacing an OIUa Board...........................................................................................................................7-34
7.12 Replacing an OMU Board...........................................................................................................................7-37
7.12.1 Checking the OMU Information .......................................................................................................7-40
7.12.2 Backing Up System Files...................................................................................................................7-42
7.12.3 Replacing the OMU Board.................................................................................................................7-43
7.12.4 Installing the Operating System and Loading the OMU Applications..............................................7-47
7.12.5 Verifying OMU Board Replacement ................................................................................................7-49
7.13 Replacing an SCUa Board...........................................................................................................................7-50
7.14 Replacing a TNUa Board............................................................................................................................7-53
7.15 Replacing an XPUa Board..........................................................................................................................7-56
7.16 Replacing an XPUb Board..........................................................................................................................7-59
7.17 Replacing a WOPB Board...........................................................................................................................7-62
7.18 Replacing a Subrack....................................................................................................................................7-64
7.19 Replacing the Independent Fan Subrack.....................................................................................................7-66
7.20 Replacing the Power Distribution Box........................................................................................................7-67
7.21 Replacing the Fan Box................................................................................................................................7-73
7.22 Replacing the Pluggable Optical Module....................................................................................................7-78
7.23 Replacing an Optical Splitter/Combiner.....................................................................................................7-80
7.24 Replacing the KVM....................................................................................................................................7-82
7.25 Replacing the LAN Switch.........................................................................................................................7-84
7.26 Replacing the GBAM..................................................................................................................................7-85

8 Replacing the Cables.................................................................................................................8-1
8.1 Replacing a Power Cable................................................................................................................................8-3
8.2 Replacing an E1/T1 Cable...............................................................................................................................8-5
8.3 Replacing an Optical Cable.............................................................................................................................8-7
8.4 Replacing an Ethernet Cable...........................................................................................................................8-9
8.5 Replacing a Clock Signal Cable....................................................................................................................8-11
8.6 Replacing a Y-Shaped Clock Cable..............................................................................................................8-13
8.7 Replacing an Inter-TNUa Cable....................................................................................................................8-14
8.8 Replacing an EMU RS485 Communication Cable.......................................................................................8-16
8.9 Replacing a Signal Cable to the Alarm Box.................................................................................................8-17
8.10 Replacing the Monitoring Signal Cable for the Power Distribution Box...................................................8-18
8.11 Replacing the Monitoring Signal Cable for the Independent Fan Subrack.................................................8-20

9 LEDs on the Boards....................................................................................................................9-1
9.1 LEDs on the DPUa Board...............................................................................................................................9-3
9.2 LEDs on the DPUc Board...............................................................................................................................9-3
9.3 LEDs on the DPUd Board...............................................................................................................................9-4
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9.4 LEDs on the EIUa Board................................................................................................................................ 9-4
9.5 LEDs on the FG2a Board................................................................................................................................9-5
9.6 LEDs on the FG2c Board................................................................................................................................9-6
9.7 LEDs on the GCUa Board...............................................................................................................................9-7
9.8 LEDs on the GOUa Board.............................................................................................................................. 9-7
9.9 LEDs on the GOUc Board.............................................................................................................................. 9-8
9.10 LEDs on the MDMC Board..........................................................................................................................9-9
9.11 LEDs on the OIUa Board..............................................................................................................................9-9
9.12 LEDs on the OMUa/OMUb Board.............................................................................................................9-10
9.13 LEDs on the PAMU Board.........................................................................................................................9-11
9.14 LEDs on the PEUa Board............................................................................................................................9-11
9.15 LEDs on the POUc Board...........................................................................................................................9-12
9.16 LEDs on the SCUa Board...........................................................................................................................9-13
9.17 LEDs on the TNUa Board...........................................................................................................................9-13
9.18 LEDs on the XPUa Board...........................................................................................................................9-14
9.19 LEDs on the XPUb Board...........................................................................................................................9-15

10 DIP Switches on Components.............................................................................................10-1
10.1 DIP Switch on the Subrack.........................................................................................................................10-2
10.2 DIP Switches on the EIUa Board................................................................................................................10-4
10.3 DIP Switch on the MDMC Board...............................................................................................................10-6
10.4 DIP Switch on the PAMU Board................................................................................................................10-7
10.5 DIP Switches on the PEUa Board...............................................................................................................10-7
10.6 DIP Switch on the PFCU Board................................................................................................................10-10
10.7 Pins on the PFCB Board............................................................................................................................10-12

11 BSC6900 Site Maintenance Record.....................................................................................11-1

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Figures

Figures
Figure 4-1 Mapping between the power switches and the components in the MPR (configured with OMU board)/
EPR/TCR...............................................................................................................................................................4-2
Figure 4-2 Mapping between the power switches and the components in the MPR (configured with GBAM)
...............................................................................................................................................................................4-3
Figure 4-3 Distribution of power switches on the power distribution box of the MPR/EPR/TCR..................... 4-4
Figure 6-1 Air filters in the single-door N68E-22 cabinet...................................................................................6-2
Figure 6-2 Air filters in the double-door N68E-22 cabinet..................................................................................6-3
Figure 6-3 Removing the air filter from the bottom of the cabinet......................................................................6-4
Figure 6-4 Installing the air filter at the bottom of the cabinet............................................................................ 6-5
Figure 7-1 Removing a board(configuring the new ejector levers)..................................................................... 7-6
Figure 7-2 Removing a board(configuring the old ejector levers).......................................................................7-7
Figure 7-3 Installing a BSC6900 board(configuring the new ejector levers)...................................................... 7-9
Figure 7-4 Installing a BSC6900 board(configuring the old ejector levers)......................................................7-10
Figure 7-5 Settings of DIP switch S2 on the MDMC board..............................................................................7-33
Figure 7-6 Procedure for determining an operation...........................................................................................7-38
Figure 7-7 Procedures for replacing an OMU board..........................................................................................7-39
Figure 7-8 Removing an OMU board that is configured with new ejector levers.............................................7-44
Figure 7-9 Installing an OMU board that is configured with new ejector levers...............................................7-45
Figure 7-10 Removing an OMU board that is configured with old ejector levers.............................................7-46
Figure 7-11 Installing an OMU board that is configured with old ejector levers..............................................7-47
Figure 7-12 Replacing a WOPB board...............................................................................................................7-63
Figure 7-13 Rear panel of the common power distribution box........................................................................7-68
Figure 7-14 Rear panel of the high-power distribution box...............................................................................7-69
Figure 7-15 DIP switch on the PFCU................................................................................................................7-74
Figure 7-16 DIP switch on the PFCU................................................................................................................7-75
Figure 7-17 Jumper pins on the PFCB...............................................................................................................7-75
Figure 7-18 Jumper pins on the PFCB...............................................................................................................7-76
Figure 7-19 Removing the fan box.....................................................................................................................7-77
Figure 7-20 Replacing an optical module..........................................................................................................7-79
Figure 7-21 Distribution of the power switches in the MPR.............................................................................7-83
Figure 7-22 Front panel of the power distribution box......................................................................................7-87
Figure 10-1 Cover plate for the DIP switch on the subrack...............................................................................10-2
Figure 10-2 Layout of the DIP switches on the EIUa board..............................................................................10-4
Figure 10-3 DIP switch on the MDMC board....................................................................................................10-6
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Figures

Figure 10-4 Layout of the DIP switch on the PAMU board..............................................................................10-7
Figure 10-5 Layout of the DIP switches on the PEUa board.............................................................................10-8
Figure 10-6 DIP switch on the PFCU board....................................................................................................10-11
Figure 10-7 DIP switch on the PFCU board....................................................................................................10-11
Figure 10-8 Pins on the PFCB board................................................................................................................10-12
Figure 10-9 Pins on the PFCB board................................................................................................................10-13

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Tables

Tables
Table 2-1 Maintenance items and tools for site maintenance...............................................................................2-2
Table 2-2 Recommended BSC6900 spare parts...................................................................................................2-3
Table 3-1 Maintenance items of the equipment room..........................................................................................3-2
Table 3-2 Maintenance items of the power supply and grounding systems.........................................................3-3
Table 3-3 BSC6900 cabinet maintenance items...................................................................................................3-4
Table 3-4 Cable maintenance items......................................................................................................................3-5
Table 4-1 Mapping between the power switches and the components in the MPR (configured with OMU board)/
EPR/TCR...............................................................................................................................................................4-2
Table 4-2 Mapping between the power switches and the components in the MPR (configured with GBAM)
...............................................................................................................................................................................4-3
Table 4-3 Mapping between the power switches and the components in the MPR/EPR/TCR............................4-4
Table 4-4 Checklist for the power supply to the cabinet components..................................................................4-6
Table 4-5 Handling power failures in the components in the cabinet..................................................................4-6
Table 7-1 Strategy on replacing faulty legacy components of the BSC6900.......................................................7-4
Table 7-2 OMU information table .....................................................................................................................7-41
Table 7-3 Checklist for the new power distribution box....................................................................................7-70
Table 7-4 Checklist for the new power distribution box....................................................................................7-72
Table 7-5 Setting of the DIP switch on the PFCU.............................................................................................7-74
Table 7-6 Setting of the DIP switch on the PFCU.............................................................................................7-75
Table 7-7 Setting of the jumper pins on the PFCB.............................................................................................7-75
Table 7-8 Setting of the jumper pins on the PFCB.............................................................................................7-76
Table 7-9 Checklist for replacing the fan box....................................................................................................7-77
Table 7-10 Parameters of optical modules.........................................................................................................7-79
Table 7-11 Checklist for monitoring optical splitter/combiner replacement......................................................7-81
Table 7-12 Checklist for LAN switch replacement............................................................................................7-85
Table 7-13 Checklist for GBAM replacement...................................................................................................7-87
Table 8-1 Setting switches SW1 to SW6..............................................................................................................8-4
Table 8-2 Checklist for power cable replacement................................................................................................8-5
Table 8-3 Checklist for E1/T1 cable replacement................................................................................................8-7
Table 8-4 Checklist for optical cable replacement...............................................................................................8-9
Table 8-5 Checklist for Ethernet cable replacement...........................................................................................8-11
Table 8-6 Checklist for clock signal cable replacement.....................................................................................8-12
Table 8-7 Checklist for the new Y-shaped clock cable......................................................................................8-14
Table 8-8 Checklist for inter-TNUa cable replacement.....................................................................................8-15
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Tables

Table 8-9 Checklist for monitoring cable replacement...................................................................................... 8-19
Table 8-10 Checklist for monitoring signal cable replacement..........................................................................8-21
Table 9-1 LEDs on the DPUa board.....................................................................................................................9-3
Table 9-2 LEDs on the DPUc board.....................................................................................................................9-3
Table 9-3 LEDs on the DPUd board....................................................................................................................9-4
Table 9-4 LEDs on the EIUa board......................................................................................................................9-5
Table 9-5 LEDs on the FG2a board......................................................................................................................9-5
Table 9-6 LEDs on the FG2c board......................................................................................................................9-6
Table 9-7 LEDs on the GCUa board....................................................................................................................9-7
Table 9-8 LEDs on the GOUa board....................................................................................................................9-7
Table 9-9 LEDs on the GOUc board....................................................................................................................9-8
Table 9-10 LEDs on the MDMC board................................................................................................................9-9
Table 9-11 LEDs on the OIUa board....................................................................................................................9-9
Table 9-12 LEDs on the OMUa/OMUb board...................................................................................................9-10
Table 9-13 LEDs on the PAMU board...............................................................................................................9-11
Table 9-14 LEDs on the PEUa board.................................................................................................................9-12
Table 9-15 LEDs on the POUc board.................................................................................................................9-12
Table 9-16 LEDs on the SCUa board.................................................................................................................9-13
Table 9-17 LEDs on the TNUa board................................................................................................................ 9-14
Table 9-18 LEDs on the XPUa board.................................................................................................................9-14
Table 9-19 LEDs on the XPUb board................................................................................................................ 9-15
Table 10-1 Description about the bits.................................................................................................................10-3
Table 10-2 Setting of the DIP switch................................................................................................................. 10-3
Table 10-3 Description of the DIP switches on the EIUa board........................................................................10-5
Table 10-4 Description of the different DIP switches........................................................................................10-6
Table 10-5 DIP switch on the MDMC board.....................................................................................................10-6
Table 10-6 DIP switch on the PAMU board...................................................................................................... 10-7
Table 10-7 Description about DIP switches on the PEUa board........................................................................10-9
Table 10-8 DIP switch on the PFCU board (in a fan box of the service subrack)...........................................10-11
Table 10-9 DIP switch on the PFCU board (in the independent fan subrack).................................................10-12
Table 10-10 Pins on the PFCB board (in a fan box of the service subrack)....................................................10-12
Table 10-11 Pins on the PFCB board (in the independent fan subrack)..........................................................10-13
Table 11-1 BSC6900 site maintenance record...................................................................................................11-1

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1

Changes in the BSC6900 GSM Site
Maintenance Guide

This chapter describes the changes in the BSC6900 GSM Site Maintenance Guide.

05 (2011-05-19)
This is the fifth commercial release of V900R012C01.
Compared with issue 04 (2010-11-30), this issue includes the following new topics:
l

7.23 Replacing an Optical Splitter/Combiner

Compared with issue 04 (2010-11-30), this issue incorporates the following changes:
Content

Description

8.2 Replacing an E1/T1 Cable

The procedure of removing and connecting the fastening
screws on both ends of the cable is optimized.

8.7 Replacing an Inter-TNUa
Cable

The procedure of removing and connecting the fastening
screws on both ends of the cable is optimized.

Compared with issue 04 (2010-11-30), this issue does not exclude any topics.

04 (2010-11-30)
This is the fourth commercial release of V900R012C01.
Compared with issue 03 (2010-09-20), this issue does not include any new topics.
Content
7 Replacing Boards and
Modules

Issue 05 (2011-05-19)

Description
The description about the caution is optimized.


1-1

BSC6900 GSM



03 (2010-09-20)
This is the third commercial release of V900R012C01.
Content

Description

7.12 Replacing an OMU Board

The procedure for this task is optimized.


02 (2010-06-21)
This is the second commercial release of V900R012C01.
Content

Description

4.3 Powering On the Cabinet

The description about the caution is optimized.


01 (2010-04-10)
This is the first commercial release of V900R012C01.
Compared with issue 03 (2009-12-05) of V900R011C00, this issue includes the following new
topics:
l

7.1 Strategy on Replacing Legacy Components in an Upgrade Scenario

l

7.10 Replacing an MDMC Board

l

7.17 Replacing a WOPB Board

l

7.24 Replacing the KVM

l

7.25 Replacing the LAN Switch

l

7.26 Replacing the GBAM

Compared with issue 03 (2009-12-05) of V900R011C00, this issue incorporates the following
changes:

1-2


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BSC6900 GSM


Content

Description

7.3 Replacing a DPUa/DPUc/
DPUd/DPUf Board

The procedure for replacing the faulty DPUa/DPUf board
is added.

7.20 Replacing the Power
Distribution Box

The procedure for replacing the faulty the common power
distribution box is added.

Compared with issue 03 (2009-12-05) of V900R011C00, this issue does not exclude any topics.

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BSC6900 GSM


2

Site Maintenance Preparations

About This Chapter
This chapter describes the preparations for the BSC6900 site maintenance, including the tool
and spare part preparations.
2.1 Site Maintenance Tool Preparations
This section lists the tools required for BSC6900 site maintenance. These tools must be placed
in the equipment room or at nearby places for easy access.
2.2 Spare Part Preparations
This section describes the spare parts required for BSC6900 site maintenance. These spare parts
must be placed in the equipment room or at nearby places for easy access.

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BSC6900 GSM


2.1 Site Maintenance Tool Preparations
This section lists the tools required for BSC6900 site maintenance. These tools must be placed
in the equipment room or at nearby places for easy access.
Table 2-1 lists the maintenance items and tools.
Table 2-1 Maintenance items and tools for site maintenance
Item

Tools

Cleaning the fan
box

ESD wrist strap, Phillips screwdriver, vacuum cleaner, ESD soft brush,
and clean cotton cloth

Cleaning the air
filters

ESD wrist strap, Phillips screwdriver, and clean cotton cloth

Replacing a board

ESD wrist strap, Phillips screwdriver, flat-head screwdriver, ESD box
or bag, clean cotton cloth, and fiber cleaner

Replacing the fan
box, power
distribution box,
or subrack

ESD wrist strap, Phillips screwdriver, flat-head screwdriver, ESD box
or bag, diagonal pliers, dry cotton cloth, and fiber cleaner

Replacing the
cables

ESD wrist strap, Ethernet meter, Ethernet cable pliers, flat-head
screwdriver, clean cotton cloth, fiber cleaner, ESD gloves, and diagonal
pliers

Tools summary for
the BSC6900 site
maintenance

ESD gloves, ESD wrist strap, Phillips screwdriver, flat-head
screwdriver, ESD box or bag, dustfree cotton cloth, fiber cleaner,
Ethernet cable tester, Ethernet cable pliers, vacuum cleaner, ESD soft
brush, and diagonal pliers

2.2 Spare Part Preparations
This section describes the spare parts required for BSC6900 site maintenance. These spare parts
must be placed in the equipment room or at nearby places for easy access.

Spare Parts Selection Criteria
The principles for preparing the BSC6900 spare parts are as follows:
l

l

2-2

When a board that works in independent mode is faulty, the board fault disrupts the services
carried on the board. Therefore, the priority to prepare a spare board for a board of this type
is high.
When a board that works in resource pool mode is faulty, the board fault does not disrupt
the services, but only deteriorates the performance of the system in certain aspects.
Therefore, the priority to prepare a spare board for a board of this type is medium.

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BSC6900 GSM


l

The filler panel is used for cabinet encapsulation and ventilation. It also ensures the
electromagnetic shielding and neatness of the cabinet. Therefore, the priority to prepare a
spare filler panel is medium.

l

When a board that works in active/standby mode is faulty, the board fault does not affect
the services because the system automatically switches over the active and standby boards.
Therefore, the priority to prepare a spare board for a board of this type is low.

Recommended Spare Parts List
Table 2-2 describes the recommended BSC6900 spare parts.
Table 2-2 Recommended BSC6900 spare parts
Spare Part

Quantity

Fan box

One for each site

Filler panel

Two for each site

Power distribution
box

One for each site

Board

One spare SCUa, DPUc, XPUa/XPUb, GCUa/GCGa, OMUa/OMUb,
and TNUa board for each site
One spare DPUa, DPUd, EIUa, OIUa, POUc, PEUa, FG2a/FG2c, and
GOUa/GOUc board for each site if these boards are configured

Optical module

One spare optical module for each site if the optical module is configured

NOTE

The site operator can also apply for a site-specific quantity of spare parts according to its unique
requirement.

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3


Routine Hardware Maintenance Items

About This Chapter
This chapter describes the routine hardware maintenance items of the BSC6900. Different items
require different maintenance methods.
3.1 Equipment Room Maintenance Items
This section describes the maintenance items in the BSC6900 equipment room. The items
include the ambience alarm, anti-theft device, door and window, temperature, humidity, indoor
air conditioner, and dustproof condition.
3.2 Maintaining the Power Supply and Grounding Systems
This section describes the maintenance items of the BSC6900 power supply and the grounding
system. The maintenance items consist of power cables, voltage, PGND cables, components
inside the cabinet, earth resistance, batteries, and rectifier.
3.3 Cabinet Maintenance Items
This section describes the maintenance items of the BSC6900 cabinet. The maintenance items
consist of fans, air filters, cabinet surface, locks and doors of cabinet, cabinet cleanliness, fan
box cleanliness, ESD wrist strap, cabinet components, and idle optical ports on boards.
3.4 Cable Maintenance Items
This section describes the cable maintenance items. The maintenance items consist of cable
labels, connectors and sockets, connection of E1/T1 cables, connection of Ethernet cables, and
connection of optical cables.

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3.1 Equipment Room Maintenance Items
This section describes the maintenance items in the BSC6900 equipment room. The items
include the ambience alarm, anti-theft device, door and window, temperature, humidity, indoor
air conditioner, and dustproof condition.
Table 3-1 lists the maintenance items of the equipment room.
Table 3-1 Maintenance items of the equipment room
Item

Interval

Operation Guide

Reference
Standard

Alarms on
equipment room
environment

Daily

Check whether power
supply alarms, fire
alarms, or smoke
alarms are generated.

No power supply
alarms, fire alarms, or
smoke alarms are
reported.

Check anti-theft nets,
equipment room
doors, and windows

Weekly

Check whether the
anti-theft nets, doors,
and windows are
intact.

The anti-theft device,
door, and window are
in good condition.

Check room
temperature

Daily

Check the
temperature indicator
in the equipment
room.

The temperature is
between 15°C and 30°
C.

Check room
humidity

Daily

Check the humidity
indicator in the
equipment room.

The humidity is
between 40% and
65%.

Check indoor air
conditioner

Weekly

Check the running
status of the air
conditioner.

The air conditioner
works properly. The
temperature set on the
air conditioner is
consistent with that
on the thermometer.

Check dustproof
condition

Weekly

Check the equipment
shell, equipment
interior, floor, and
desktop.

The cabinet surface is
clean, and the cabinet
interior is dustfree.

3.2 Maintaining the Power Supply and Grounding Systems
This section describes the maintenance items of the BSC6900 power supply and the grounding
system. The maintenance items consist of power cables, voltage, PGND cables, components
inside the cabinet, earth resistance, batteries, and rectifier.
Table 3-2 lists the maintenance items of the power supply and grounding systems.
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Table 3-2 Maintenance items of the power supply and grounding systems
Item

Interval

Operation Guide

Reference Standard

Power cables

Monthly or
quarterly

Check all the power cables
between the power supply
system and the power
distribution box of the
cabinet.

l The power cables are not
aged.
l The PGND cables are
securely connected. The
connection points are not
corroded.

Voltage

Monthly or
quarterly

Measure the voltage of the
power supply using a
multimeter.

The voltage of the power
supply is within the standard
voltage range. For details,
refer to Technical
Specifications of the Cabinet.

PGND cables

Monthly or
quarterly

Check all the PGND
cables and grounding
bars.

l The PGND cables are not
aged.
corroded.
l The grounding bars are
not corroded. Proper anticorrosion measures are
taken.

Components
inside the
cabinet

Monthly or
quarterly

Check the connection
terminals and captive
screws of all the PGND
cables.

l The PGND cables are not
aged.
corroded.
l The connection terminals
and captive screws are
securely and correctly
connected, and they are
not corroded.

Earth
resistance

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Monthly or
quarterly

Use an electric earth
resistance tester to
measure the earth
resistance and keep a
record.


The grounding resistance is
less than 10 ohms.

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Item

Interval

Operation Guide

Reference Standard

Batteries and
rectifier

Yearly

Check the batteries and
rectifier of the power
supply system in each
equipment room.

l The batteries are normal.
There is no battery
leakage, swelling, or
corrosion.
l The capacity of all
batteries meets the
standard requirements
and the batteries are
correctly connected.
l The rectifier meets the
required specifications.

3.3 Cabinet Maintenance Items
This section describes the maintenance items of the BSC6900 cabinet. The maintenance items
consist of fans, air filters, cabinet surface, locks and doors of cabinet, cabinet cleanliness, fan
box cleanliness, ESD wrist strap, cabinet components, and idle optical ports on boards.
Table 3-3 lists the maintenance items of the BSC6900 cabinet.
Table 3-3 BSC6900 cabinet maintenance items
Item

Interval

Operation Guide

Reference Standard

Fans

Weekly or
monthly

Check the running state of
the fans.

The fan works properly
without making abnormal
sounds.

Air filters

Check the air filters of
each cabinet.

Cabinet surface

Monthly or
quarterly

Check the cabinet surface
and the cabinet labels.

intact. The labels are
legible.

Locks and
doors

Monthly or
quarterly

Check whether the lock is
normal and the door can be
opened and closed easily.

The locks and the doors of
the cabinet work properly.

Cleanness of
the cabinets

3-4

Quarterly

The air filters are dust-free
and damage-free. Clean the
dirty air filter according to
6 Cleaning and Replacing
the Air Filters. Replace
the damaged air filter
according to 6.4 Replacing
the Air Filters.

Monthly or
quarterly

Check whether the cabinet
is clean.

clean. The interior of the
cabinet is dust-free.


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Item

Interval

Operation Guide

Reference Standard

Cleanness of
the fan box

Yearly

Clean the fan box
according to 5 Cleaning
the Fan Box.

The surface of the fan box
is clean. The interior of the
fan box is dust-free.

Check the LEDs of every
component inside the
cabinet.

The LEDs work properly.
For details on the LEDs,
refer to the following part:
Front Panel of the HighPower Power Distribution
Box, Fan Box (Configured
with the PFCU Board), Fan
Box (Configured with the
PFCB Board), 9 LEDs on
the Boards.

Inside of the
cabinet

Monthly or
quarterly

Measure the grounding
resistance of the ESD wrist
strap as follows:
ESD wrist strap

Quarterly

l Use an ESD wrist strap
tester to test the ESD
wrist strap.
l Use a multimeter.

Protection of
the idle optical
ports on boards

Monthly or
quarterly

Check the dustproof caps
on the idle optical ports.

l When you use an ESD
wrist strap tester, the
GOOD LED on it is
ON.
l When you use a
multimeter, the
grounding resistance of
the ESD wrist strap
ranges from 0.8
megohm to 1.2
megohms.
The dustproof caps are on
the idle optical ports.

3.4 Cable Maintenance Items
This section describes the cable maintenance items. The maintenance items consist of cable
labels, connectors and sockets, connection of E1/T1 cables, connection of Ethernet cables, and
connection of optical cables.
Table 3-4 describes the cable maintenance items.
Table 3-4 Cable maintenance items
Item

Operation Guide

Reference Standard

Check
connectors and
sockets

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Interval
Monthly or
quarterly

Check the insulators of
the connectors or the
sockets.

The insulators of the
connectors or the sockets
are clean.


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Item

Interval

Operation Guide

Reference Standard
l The E1/T1 cables are
properly connected.

E1/T1 cable
connections

Yearly

Check the connections
of the E1/T1 cables.

l The E1/T1 cables are
intact.
l The labels on the cables
are legible.
l The Ethernet cables are
properly connected.

Ethernet cable
connections

Yearly

of the Ethernet cables.

l The Ethernet cables are
intact.
are legible.
l The optical cables are
properly connected.

Optical cable
connections

Yearly

of the optical cables.

l The optical cables are
intact.
are legible.

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4

Powering On/Off the BSC6900

About This Chapter
This chapter describes how to power on and power off the BSC6900. The following is described:
the distribution of the power switches, powering on the BSC6900 cabinet, powering off the
BSC6900 cabinet in a normal situation, and powering off the BSC6900 cabinet in case of
emergencies.
4.1 Distribution of Power Switches on the Common Power Distribution Box
This section describes the mapping between the six routes of power outputs from the power
distribution box of the BSC6900 cabinet and the components in the BSC6900 cabinet.
4.2 Distribution of Power Switches on the High-Power PDB
The power distribution box of the MPR/EPR/TCR provides 20 (10 x 2) routes of power outputs.
This section describes the mapping between the eight routes of power outputs from the power
distribution box of the MPR/EPR/TCR and the components in the cabinet.
This section describes how to power on the BSC6900 cabinet and how to handle common power
failures in the components of the cabinet.
4.4 Powering Off the Cabinet in a Normal Situation
This section describes how to power off the BSC6900 cabinet in a normal situation. You must
power off the BSC6900 cabinet before relocating the equipment or before a forecasted territorial
power blackout. Powering off the BSC6900 cabinet disrupts all the ongoing services. Therefore,
power off the BSC6900 cabinet only when required.
4.5 Powering Off the Cabinet in Emergency Cases
This section describes how to power off the BSC6900 cabinet in emergency cases. To ensure
the security of the BSC6900 cabinet, the BSC6900 cabinet must be powered off in emergency
cases, such as fire, smoke, or water immersion.

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4.1 Distribution of Power Switches on the Common Power
Distribution Box
This section describes the mapping between the six routes of power outputs from the power
distribution box of the BSC6900 cabinet and the components in the BSC6900 cabinet.

Distribution of Power Switches on the Power Distribution Box of the MPR
(Configured with OMU Board)/EPR/TCR
When the MPR is configured with the OMU board, the distribution of power switches on the
power distribution box of the MPR is the same as the distribution of power switches on the power
distribution box of the EPR/TCR. Figure 4-1 shows the mapping between the six power switches
on the power distribution box and the components in the MPR (configured with OMU board)/
EPR/TCR. Table 4-1 presents the mapping between the six power switches and the components
in the MPR (configured with OMU board)/EPR/TCR.
Figure 4-1 Mapping between the power switches and the components in the MPR (configured
with OMU board)/EPR/TCR

Table 4-1 Mapping between the power switches and the components in the MPR (configured
with OMU board)/EPR/TCR
Component
Subrack 2

SW1, SW4

Subrack 1
4-2

Power Switch on the Power Distribution Box

SW2, SW5

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Component


Subrack 0

SW3, SW6

Distribution of Power Switches on the Power Distribution Box of the MPR
(Configured with GBAM)
Figure 4-2 shows the mapping between the six power switches on the power distribution box
and the components in the MPR that is configured with GBAM. Table 4-2 presents the mapping
between the six power switches on the power distribution box and the components in the MPR
that is configured with GBAM.
Figure 4-2 Mapping between the power switches and the components in the MPR (configured
with GBAM)

Table 4-2 Mapping between the power switches and the components in the MPR (configured
with GBAM)
Component
Subrack 1

SW1, SW4

Subrack 0

SW2, SW5

KVM

SW3

LAN switch
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Component


GBAM

SW3, SW6

4.2 Distribution of Power Switches on the High-Power PDB
The power distribution box of the MPR/EPR/TCR provides 20 (10 x 2) routes of power outputs.
This section describes the mapping between the eight routes of power outputs from the power
distribution box of the MPR/EPR/TCR and the components in the cabinet.
The power distribution box of the MPR/EPR/TCR provides eight routes of power outputs in two
groups (group A and group B), which are controlled by switches A7 to A10 and B7 to B10
respectively. Figure 4-3 shows the mapping between the power switches on the power
distribution box and the components in the MPR/EPR/TCR. Table 4-3 lists the mapping between
the power switches and the components.
Figure 4-3 Distribution of power switches on the power distribution box of the MPR/EPR/TCR

Table 4-3 Mapping between the power switches and the components in the MPR/EPR/TCR
Component
Subrack 2

A8, B8

Subrack 1

A9, B9

Subrack 0
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A10, B10

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Component


Independent fan subrack

A7, B7

This section describes how to power on the BSC6900 cabinet and how to handle common power
failures in the components of the cabinet.

Prerequisite
l

The surface of the input power cables is not damaged. The input power cables are correctly
and securely connected.

l

The green and yellow PGND cable for the cabinet is properly connected.

l

The power switches SW1 to SW6 (or A1 to A10 and B1 to B10) on the power distribution
box are set to OFF.

CAUTION
Ensure that the Checking and Setting the Subrack DIP Switch operation is performed before the
cabinet is powered on. After the cabinet is powered on, any modification to the setting of a DIP
switch on a subrack does not take effect.

Procedure
Step 1 Set the power switches that control the BSC power supply on the power distribution frame (PDF)
to ON.
Step 2 Set the power switches on the power distribution box to ON after the RUN LED on the front
panel of the power distribution box blinks every alternate 0.25s.
If the cabinet is...

Then...

MPR,

Set the corresponding power switches on the power distribution
box to ON. Then, go to Step 3.

EPR/TCR,

Set the power switches that correspond to the subracks
configured in the same cabinet to ON. Then, go to Step 4.

Step 3 Set the power switch on the front panel of the GBAM and the power switch on the rear panel of
the KVM to ON if the GBAM is configured.
Step 4 Check the power supply to the cabinet components, as listed in Table 4-4.

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Table 4-4 Checklist for the power supply to the cabinet components
Component

Normal LED Status

Board

The green RUN LED on the board panel blinks every
alternate second.

Fan box

The green LED on the panel of the fan box blinks every
alternate second after the subrack/independent fan
subrack is powered on.

Power distribution monitor board

The green RUN LED on the board panel blinks every
alternate second.

GBAM

The main power LED on the front panel is on.

LAN switch

The POWER LED on the front panel is on.

KVM

The POWER LED on the keyboard is on.

Step 5 Power on the cabinet and then check the power supply to the components in the cabinet. Clear
the power failures, if any, according to Table 4-5.
Table 4-5 Handling power failures in the components in the cabinet
Failure Type

Handling Measures

Power failure in all the internal
parts of the cabinet

Check whether the -48 V power cables and the RTN power
cables are properly connected.
l If the cable connection is wrong, set all the power
switches on the power distribution box to OFF, and then
reconnect the power cables.
CAUTION
Set the power switches that control the BSC power supply on
the PDF to OFF before reconnecting the power cables.

l If the cable connection is correct, replace the
Overvoltage Protection Board (WOPB). If the failure
persists, replace the power distribution box.
Power failure in all the boards
in a subrack

Use a multimeter to measure the input voltage of the subrack
l If the input voltage is between -40 V and -57 V, replace
the subrack.
l If the input voltage is not between -40 V and -57 V, check
the connections of the power cables. If the connections
of the power cables are loose, set the power switch on
the power distribution box corresponding to the subrack
to OFF and then reconnect the power cables. Otherwise,
replace the power distribution box because the power
switch on it may be faulty.

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Failure Type

Handling Measures

Power failure in a certain board
in a subrack

Perform the following operations:
1. Check whether the board is securely connected. If the
board is not securely connected, reinstall the board.
Observe the LEDs on the board panel. For details about
the states of the LEDs on the board panel, see 9 LEDs
on the Boards.
2. Remove the board, and check whether there is any
distorted pin, broken pin, or or if any pin is missing on
the board socket. Replace the subrack if there is a
distorted pin, broken pin, or if a pin is missing.
3. Reinstall the board, and observe the LEDs on the board
panel. For details about the states of the LEDs on the
board panel, see 9 LEDs on the Boards.
4. If the LEDs indicate that the board does not work
normally, remove the board and install it into an idle slot
that is for a board of the same type. Then, observe the
LEDs on the board panel.
l If the board works normally, it indicates that the slot
is faulty. In this case, replace the subrack.
l If the board does not work normally, it indicates that
the board is faulty. In this case, replace the board.

Power failure in the GBAM

Use a multimeter to measure the input voltage of the GBAM.
the power modules of the GBAM.
the power distribution box corresponding to the GBAM
to OFF and then reconnect the power cables. Otherwise,
replace the power distribution box because the power
switch on it may be faulty.

Power failure in any other part
in the cabinet

Use a multimeter to measure the input voltage of the faulty
component.
the component.
the power distribution box corresponding to the
component to OFF and then reconnect the power cables.
Otherwise, replace the power distribution box because
the power switch on it may be faulty.

----End

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4.4 Powering Off the Cabinet in a Normal Situation
This section describes how to power off the BSC6900 cabinet in a normal situation. You must
power off the BSC6900 cabinet before relocating the equipment or before a forecasted territorial
power blackout. Powering off the BSC6900 cabinet disrupts all the ongoing services. Therefore,
power off the BSC6900 cabinet only when required.

Prerequisite
l

The green and yellow PGND cable for the cabinet is properly connected.

l

The data on the BSC6900 is backed up. Back up the system data by referring to .

Context
To minimize the adverse impact on the BSC6900, power off the EPR/TCR before you power
off the MPR.

Procedure
l

In the case that the external GBAM is configured
1.

Run the Telnet client, such as PuTTY, on the LMT PC. Enter the IP address of the
external GBAM and then log in to the GBAM as user root.

2.

Run the poweroff command to shut down the external GBAM.

3.

Set the power switch on the front panel of the external GBAM to OFF.

4.

Set power switches SW1 to SW6 on the power distribution box of the EPR/TCR to
OFF.

5.

If multiple EPR/TCRs are configured, repeat Step 4 to power off all the EPRs/TCRs.

CAUTION
If only a few EPRs/TCRs are powered off, data inconsistency may occur.
6.
7.

Set power switches SW1 to SW6 on the power distribution box of the MPR to OFF.

8.
l

Turn off the power switch on the rear panel of the KVM.
Set the power switches that control the BSC6900 power supply on the PDF to OFF.

In the case that the OMU board is configured
1.

Set the power switches corresponding to the subracks configured in the EPR. That is,
set the power switches A7 to A10 and B7 to B10 on the power distribution box to
OFF in sequence.

2.

Flip open the ejector levers of the OMU board.
NOTE

Repeat this step if two OMU boards are configured. After you flip open the upper and lower
ejector levers, the OMU board automatically shuts down the operating system and hard disks.
The OFFLINE LED on the board is on, which indicates that the board is powered off.

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3.

After the OFFLINE LED on the OMU board is ON, set the power switches A7 to
A10 and B7 to B10 on the power distribution box to OFF in sequence.

4.

Flip the ejector levers of the OMU board inwards until they are in position.

5.

Set the power switches that control the BSC power supply on the PDF to OFF.

----End

4.5 Powering Off the Cabinet in Emergency Cases
This section describes how to power off the BSC6900 cabinet in emergency cases. To ensure
the security of the BSC6900 cabinet, the BSC6900 cabinet must be powered off in emergency
cases, such as fire, smoke, or water immersion.

Procedure
Step 1 Set all the switches on the power distribution box of the BSC6900 cabinet to OFF.
Step 2 If time permits, set the switches that control the power supply to the BSC6900 on the PDF to
OFF.
----End

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5

Cleaning the Fan Box

This chapter describes how to clean a fan box. To ensure stability and reliability of the equipment,
the maintenance personnel should clean each fan box (including the fan boxes in the service
subracks and the fan boxes in the independent fan subrack) regularly, preferably once every
year.

Prerequisite
l

The tools are ready. They are the ESD wrist strap, clean cotton cloth, ESD soft brush,
vacuum cleaner, and Phillips screwdriver.

l

A clean backup fan box is ready for use.

Context

CAUTION
l To protect the components from electrostatic discharge, wear an ESD wrist strap properly.
Ensure that the ESD wrist strap is properly connected to the ESD connector on the cabinet.
If no ESD wrist strap or no proper grounding point is available, wear ESD gloves.
l Cleaning the fan box severely affects heat dissipation; therefore, you should replace the fan
box in less than one minute. Otherwise, the boards may be damaged due to high temperature.

Procedure
Step 1 Clean the backup fan box by using a clean cotton cloth, an ESD soft brush, and a vacuum cleaner.
Step 2 Use a Phillips screwdriver to open the front door of the cabinet and loosen the two captive screws
on the fan box.
Step 3 Remove the fan box from the cabinet.

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DANGER
When replacing the fan box, do not put your hand inside the fan box. Otherwise, the revolving
fan blade may injure your fingers.
Step 4 Install the backup fan box into the cabinet and then fasten the captive screws to secure the fan
box.
Step 5 Clean the removed fan box with a clean cotton cloth, an ESD soft brush, and a vacuum cleaner.
After being cleaned, the fan box is reserved as a backup for future use.
Step 6 Repeat Step 2 through Step 5 to replace other fan boxes.
----End

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6


Cleaning and Replacing the Air Filters

About This Chapter
This chapter describes how to clean and replace an air filter. The air filter protects the boards
and the BSC6900 from dust. If an air filter is damaged, you must replace it with a new one in
time.
6.1 Position of the Air Filters
This section describes the position of the air filters in the BSC6900 cabinet. The air filters are
installed on the inner side of the front and back doors and at the bottom of the cabinet.
6.2 Cleaning the Air Filter at the Bottom of the N68E-22 Cabinet
This section describes how to clean the air filter at the bottom of the N68E-22 cabinet. The
maintenance personnel should clean the air filter at the bottom of each cabinet regularly,
preferably once every quarter.
6.3 Cleaning the Air Filter on the Inner Side of the Cabinet Door
This section describes how to clean the air filter on the inner side of the cabinet door. The
maintenance personnel should clean the air filters regularly, preferably once every quarter.
6.4 Replacing the Air Filters
This section describes how to replace a worn-out BSC6900 air filter. It takes about five minutes
to replace an air filter.

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6.1 Position of the Air Filters
This section describes the position of the air filters in the BSC6900 cabinet. The air filters are
installed on the inner side of the front and back doors and at the bottom of the cabinet.
Figure 6-1 shows the position of the air filters in the single-door N68E-22 cabinet. Figure
6-2 shows the position of the air filters in the double-door N68E-22 cabinet.
Figure 6-1 Air filters in the single-door N68E-22 cabinet

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Figure 6-2 Air filters in the double-door N68E-22 cabinet

NOTE

The air filter at the bottom of the cabinet is white, and fixed on the rack with screws. The other filters are
black, and fixed on the cabinet with binding strips.

6.2 Cleaning the Air Filter at the Bottom of the N68E-22
Cabinet
This section describes how to clean the air filter at the bottom of the N68E-22 cabinet. The
maintenance personnel should clean the air filter at the bottom of each cabinet regularly,
preferably once every quarter.

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Prerequisite
The tools are ready. They are the ESD wrist strap, Phillips screwdriver, and dry cleaning cloth.

Context

CAUTION
To protect the components from electrostatic discharge, wear an ESD wrist strap properly.
Ensure that the ESD wrist strap is properly connected to the ESD connector on the cabinet. If
no ESD wrist strap or no proper grounding point is available, wear ESD gloves.

Procedure
Step 1 Open the front door of the cabinet and then remove the two screws from the air filter with a
Phillips screwdriver, as shown in Figure 6-3.
Figure 6-3 Removing the air filter from the bottom of the cabinet

Step 2 Hold the panel of the air filter frame with both hands and lift the frame slightly to raise the panel
higher than the screws fixing the grounding cables at the bottom of the cabinet. Then, pull the
frame out of the cabinet slowly and completely.
Step 3 Clean the air filter with water and wipe it up with dry cloth. Then, dry the air filter in a ventilated
place.
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CAUTION
Do not place a wet air filter in the cabinet. The equipment may be damaged due to the short
circuit when the water is absorbed by the cabinet.
Step 4 Insert the clean air filter carefully along the guide rails into the cabinet. Do not push it forcibly.
Step 5 After the air filter is in position, fix the two screws on the air filter frame with a Phillips
screwdriver, as shown in Figure 6-4.
Figure 6-4 Installing the air filter at the bottom of the cabinet

----End

6.3 Cleaning the Air Filter on the Inner Side of the Cabinet
Door
This section describes how to clean the air filter on the inner side of the cabinet door. The
maintenance personnel should clean the air filters regularly, preferably once every quarter.

Prerequisite
l
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The tools are ready. They are the ESD wrist strap and cotton cloth that is dry and clean.

6-5


BSC6900 GSM

Context

CAUTION

Procedure
Step 1 Open the door of the cabinet and strip off the black air filter from the inside of the door.
Step 2 Clean the air filter with water, and then dry the air filter in a ventilated place or by using a water
extractor.

CAUTION
Do not place a wet air filter in the cabinet. The equipment may be damaged due to the short
circuit when the water is absorbed by the cabinet.
Step 3 Clean the inside metal surface of the door with the clean cotton cloth.
Step 4 Stick the clean air filter along the edges of the inside of the door.

CAUTION
The air filters must be tightly stuck to the binding strips to avoid falling off. If the binding strips
fail to work, replace them with new ones.
----End

6.4 Replacing the Air Filters
This section describes how to replace a worn-out BSC6900 air filter. It takes about five minutes
to replace an air filter.

Prerequisite
l
l

6-6

The tools are ready. The tools are the ESD wrist strip and Phillips screwdriver.
A new air filters for the BSC6900 are ready.


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BSC6900 GSM


Context

CAUTION

Procedure
Step 1 Remove the air filter from the cabinet.
If...

Then...

The air filter is installed at the bottom of
the cabinet,

Loosen the retention screws with the Phillips
screwdriver and then remove the air filter.

The air filter is installed on the inner side Remove the air filter.
of the front door or the back door,

Step 2 Install the new air filter.
If...

Then...

The air filter needs to be installed at the
bottom of the N68E-22 cabinet,

Install the air filter in the original position and
fasten the screws with the Phillips screwdriver.

The air filter needs to be installed on the
inner side of the front door or the back
door,

Stick the black air filter along the edges of the
inner side of the door. Place the black air filter
along the edges of the inner side of the door.
Ensure that the edges of the air filter are tightly
attached to the black binding strips to prevent it
from falling off.

----End

Follow-up Procedure
Dispose of the replaced air filter properly to prevent environmental pollution.

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BSC6900 GSM


7

Replacing Boards and Modules

About This Chapter
This chapter describes how to replace boards and modules in the BSC6900 cabinet, which
involves replacing the boards and modules, acknowledging a successful replacement, and
handling of the faulty boards. Each section provides an estimated time for the replacement of
the board as a reference.
7.1 Strategy on Replacing Legacy Components in an Upgrade Scenario
This section describes the legacy components that can be used by the BSC6900 after an upgrade.
It also describes the strategy on how to replace the faulty legacy components.
7.2 Procedure for Replacing a Board
This section describes the procedure for replacing a BSC6900 board.
7.3 Replacing a DPUa/DPUc/DPUd/DPUf Board
This section describes how to replace a faulty DPUa/DPUc/DPUd/DPUf board. The DPUa/
DPUc/DPUd/DPUf board is hot-swappable. It takes about two minutes to replace the board.
7.4 Replacing an EIUa Board
This section describes how to replace a faulty EIUa board. The EIUa board is hot-swappable. It
takes about eight minutes to replace an EIUa board.
7.5 Replacing an FG2a Board
This section describes how to replace a faulty FG2a board. The FG2a board is hot swappable.
It takes about five minutes to replace the board.
7.6 Replacing an FG2c Board
This section describes how to replace a faulty FG2c board. The FG2c board is hot-swappable.
7.7 Replacing a GCUa/GCGa Board
This section describes how to replace a faulty GCUa/GCGa board. The GCUa/GCGa board is
hot-swappable. It takes about five minutes to replace the board.
7.8 Replacing a GOUa Board
This section describes how to replace a faulty GOUa board. The GOUa board is hot-swappable.
7.9 Replacing a GOUc Board
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BSC6900 GSM


This section describes how to replace a faulty GOUc board. The GOUc board is hot-swappable.
7.10 Replacing an MDMC Board
This section describes how to replace a faulty MDMC board. The MDMC board is hotswappable. It takes about ten minutes to replace the board.
7.11 Replacing an OIUa Board
This section describes how to replace a faulty OIUa board. The OIUa board is hot-swappable.
7.12 Replacing an OMU Board
This section describes how to replace a faulty OMU board. The OMU board is hot-swappable.
It takes about 16 minutes to replace an OMU board.
7.13 Replacing an SCUa Board
This section describes how to replace a faulty SCUa board. The SCUa board is hot-swappable.
It takes about four minutes to replace the board.
7.14 Replacing a TNUa Board
This section describes how to replace a faulty TNUa board. The TNUa board is hot-swappable.
It takes about four minutes to replace the board.
7.15 Replacing an XPUa Board
This section describes how to replace a faulty XPUa board. The XPUa board is hot-swappable.
It takes about six minutes to replace and load a board.
7.16 Replacing an XPUb Board
This section describes how to replace a faulty XPUb board. The XPUb board is hot-swappable.
It takes about six minutes to replace and load a board.
7.17 Replacing a WOPB Board
This section describes how to replace a faulty WOPB board. The WOPB board is hot-swappable.
It takes about ten minutes to replace the board.
7.18 Replacing a Subrack
This section describes how to replace a faulty BSC6900 subrack. It takes about 60 minutes to
replace a subrack.
7.19 Replacing the Independent Fan Subrack
When the independent fan subrack in the BSC6900 is faulty, the independent fan subrack must
be replaced. It takes about 15 minutes to replace an independent fan subrack.
7.20 Replacing the Power Distribution Box
This section describes how to replace a faulty power distribution box. It takes about 25 minutes
to replace a power distribution box.
7.21 Replacing the Fan Box
When a fan box in the service subrack or in the independent fan subrack is faulty, the fan box
must be replaced. You should finish the replacement of the fan box in less than one minute.
7.22 Replacing the Pluggable Optical Module
This section describes how to replace a pluggable optical module when the module is faulty.
7.23 Replacing an Optical Splitter/Combiner
This section describes how to replace an optical splitter/combiner. The BSC6900 optical
splitters/combiners are LC/LC-LC single-mode optical splitter/combiner and LC/LC-LC multimode optical splitter/combiner. It takes about five minutes to replace an optical splitter/
combiner.
7-2


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BSC6900 GSM


7.24 Replacing the KVM
This section describes how to replace a faulty KVM. It takes about 10 minutes to replace a KVM.
7.25 Replacing the LAN Switch
This section describes how to replace a faulty LAN switch. It takes about 10 minutes to replace
a LAN switch.
7.26 Replacing the GBAM
This section describes how to replace a faulty GBAM. It takes about 40 minutes to replace a
GBAM. There are three models of GBAM, namely, IBM X3650T, C5210, and HP CC3310.

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BSC6900 GSM


7.1 Strategy on Replacing Legacy Components in an
Upgrade Scenario
This section describes the legacy components that can be used by the BSC6900 after an upgrade.
It also describes the strategy on how to replace the faulty legacy components.
Table 7-1 describes the strategy on how to replace the faulty legacy components of the
BSC6900.
Table 7-1 Strategy on replacing faulty legacy components of the BSC6900
Legacy Component

With Spare Part

Without Spare Part

OMUb board

Replace the faulty OMUb
board with the spare OMUb
board. For details, see 7.12
Replacing an OMU Board.

Replace the faulty OMUb
board with the spare OMUa
board. For details on how to
replace an OMUb board with
an OMUa board, see 7.12
Replacing an OMU Board.

DPUa board

Replace the faulty DPUa
board with the spare DPUa
board. For details, see 7.3
Replacing a DPUa/DPUc/
DPUd/DPUf Board.

Replace the faulty DPUa
board with the spare DPUc
board. For details on how to
replace a DPUa board with a
DPUc board, see 7.3
Replacing a DPUa/DPUc/
DPUd/DPUf Board.

GBAM/LAN switch

Replace the faulty GBAM/
LAN switch with the spare
GBAM/LAN switch. For
details, see 7.26 Replacing
the GBAM and 7.25
Replacing the LAN Switch.

Replace the faulty GBAM
with the spare OMUa board.
For details on how to replace
the GBAM with an OMUa
board, see 7.26 Replacing
the GBAM.

Common power distribution
box

Replace the faulty power
distribution box with the
spare power distribution box.
For details, see 7.20
Replacing the Power
Distribution Box.

Contact Huawei engineers.

7.2 Procedure for Replacing a Board
This section describes the procedure for replacing a BSC6900 board.
7.2.1 Removing a Board
This section describes how to remove a BSC6900 board.
7.2.2 Inserting a Board
7-4


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BSC6900 GSM


This section describes how to insert a BSC6900 board into the subrack.

7.2.1 Removing a Board
This section describes how to remove a BSC6900 board.

Prerequisite
The tools are ready, including the ESD wrist strap, Phillips screwdriver, ESD box or bag, dustfree
cotton cloth, and fiber cleaner.

Context
All the boards in the BSC6900 cabinet, except the OMUa board, are hot-swappable. For other
principles of removing a board, see Precautions on Board Operation.

CAUTION
l The OMUa board can be hot-swappable only after the operating system is shut down.
l To protect the components from electrostatic discharge, wear an ESD wrist strap properly.
Ensure that the ESD wrist strap is properly connected to the ESD connector on the cabinet.
If no ESD wrist strap or no proper grounding point is available, wear ESD gloves.

Procedure
l

Removing a board(configuring the new ejector levers)
1.

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Loosen the fastening screws on the board panel counterclockwise. Ensure that the
screws are fully detached from the subrack, as shown in parts A of Figure 7-1


7-5

BSC6900 GSM


Figure 7-1 Removing a board(configuring the new ejector levers)

2.

Press and hold the two locking buttons and turn the ejector levers on the board panels,
as shown in part B of Figure 7-1. The board is detached from the backplane, as shown
in part C of Figure 7-1.

3.

Hold the two ejector levers and pull the board along the guide rails, as shown in part
C of Figure 7-1.

CAUTION
Pull the board steadily without shaking the board to avoid damaging the pins on the
backplane or the board connector.
4.
5.

7-6

Pull the board out of the subrack by pulling the upper ejector lever on the front panel
with one hand and holding the bottom of the board by the other.
Put the removed board in an ESD case or bag.


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BSC6900 GSM


CAUTION
While removing a board, do not touch the PCB or any other devices except for jumpers
and DIP switches.
l

Removing a board(configuring the old ejector levers)
1.

Loosen the fastening screws on the board panel counterclockwise. Ensure that the
screws are fully detached from the subrack, as shown in parts A of Figure 7-2.
Figure 7-2 Removing a board(configuring the old ejector levers)

2.

Press the self-locking spring on the two ejector levers on the board panel, and at the
same time, turn the two ejector levers outwards, as shown in part B of Figure 7-2.
The board is detached from the backplane, as shown in part C of Figure 7-2.

3.

Hold the two ejector levers and pull the board along the guide rails, as shown in part
C of Figure 7-2.

CAUTION
Pull the board steadily without shaking the board to avoid damaging the pins on the
backplane or the board connector.
4.
5.
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Pull the board out of the subrack by pulling the upper ejector lever on the front panel
with one hand and holding the bottom of the board by the other.
Put the removed board in an ESD case or bag.

7-7

BSC6900 GSM


CAUTION
While removing a board, do not touch the PCB or any other devices except for jumpers
and DIP switches.
----End

7.2.2 Inserting a Board
This section describes how to insert a BSC6900 board into the subrack.

Prerequisite
l

The tools are ready, including the ESD wrist strap, Phillips screwdriver, and ESD box or
bag.

l

A new board is ready and the DIP switches are correctly set.

Context

CAUTION
l You are required to wear an ESD Wrist Strap and plug the ESD wrist strap into the ESD
connector of the cabinet before inserting a board.
l While inserting a board, do not touch the PCB or any other devices except the jumpers and
DIP switches with your bare hands.
For other principles of installing a BSC6900 board, see Precautions on Board Operation.

Procedure
l

Inserting a Board (configuring the new ejector levers)
1.

2.

7-8

Take the new board out of the ESD box. Then, check the pins and the sockets of the
board.
If there is any missing or broken pin, any bent ping or socket, contact Huawei engineers
for replacement.
Press and hold the two locking buttons and turn the ejector levers on the board panels,
as shown in parts A of Figure 7-3. Turn the ejector lever into the position, as shown
in part B of Figure 7-3.


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BSC6900 GSM


Figure 7-3 Installing a BSC6900 board(configuring the new ejector levers)

3.

Hold the panel with one hand and the lower edge of the board with the other hand,
and then push the board into the subrack along the guide rails until the ejector levers
are half closed.

CAUTION
Push in the board slowly and steadily to avoid damage to the pins on the backplane
and the metal piece on the board.
4.

Lower the ejector levers of the OMU board until they are in position, as shown in part
C of Figure 7-3.

5.

Secure the screws on the OMU board, as shown in part D of Figure 7-3.
NOTE

You need to push the screws inwards to secure the screws into the holes on the subrack.

l

Inserting a Board (configuring the old ejector levers)
1.

Take the new board out of the ESD box. Then, check the pins and the sockets of the
board.
If there is any missing or broken pin, any bent ping or socket, contact Huawei engineers
for replacement.

2.

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Press the latch and turn the ejector lever outwards, as shown in parts A of Figure
7-4. Turn the ejector lever into the position, as shown in part B of Figure 7-4.

7-9

BSC6900 GSM


Figure 7-4 Installing a BSC6900 board(configuring the old ejector levers)

3.

Hold the panel with one hand and the lower edge of the board with the other hand,
and then push the board into the subrack along the guide rails until the ejector levers
are half closed.

CAUTION
Push in the board slowly and steadily to avoid damage to the pins on the backplane
and the metal piece on the board.
4.

Lower the ejector levers of the OMU board until they are in position, as shown in part
C of Figure 7-4.

5.

Secure the screws on the OMU board, as shown in part D of or Figure 7-4.
NOTE

You need to push the screws inwards to secure the screws into the holes on the subrack.

----End

7.3 Replacing a DPUa/DPUc/DPUd/DPUf Board
This section describes how to replace a faulty DPUa/DPUc/DPUd/DPUf board. The DPUa/
DPUc/DPUd/DPUf board is hot-swappable. It takes about two minutes to replace the board.

7-10


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BSC6900 GSM


Prerequisite
l

The tools are ready. The tools are the ESD wrist strap, Phillips screwdriver, and ESD box
or bag.

l

A new DPUa/DPUc/DPUd/DPUf board is ready.

l

The LMT is started and communicates with the OMU properly.

Context

CAUTION
l To avoid damage to the boards, ASIC chips, or other electronic components, wear an ESD
wrist strap properly. Ensure that the ESD wrist strap is properly connected to the ESD
connector on the cabinet. If no ESD wrist strap or no proper grounding point is available,
wear ESD gloves.
l It is recommended that you use a board of the same type to replace the board. To use a board
of the different version to replace the board (for example, the board of version a replace the
board of version b), contact Huawei for technical support.

CAUTION
Replacing the DPUa/DPUc/DPUd/DPUf board disrupts all the services carried on the board.

Procedure
Step 1 Run the LST SUBRACK command to query the inhibited status of the board.
If...

Then...

Logical inhibited board or Physical
Go to Step 2.
inhibited board includes the DPUa/
DPUc/DPUd/DPUf board to be replaced.
Logical inhibited board or Physical
inhibited board does not include the
DPUa/DPUc/DPUd/DPUf board to be
replaced.

1. Run the INH BRD command to physically
inhibit the board.
2. Go to Step 2.
NOTE
Physically inhibiting the DPUa/DPUc/DPUd/DPUf
board prevents new accesses from the board and
reduces the impact of replacing the board on the
BSC6900 operation.

Step 2 Remove the DPUa/DPUc/DPUd/DPUf board to be replaced by referring to 7.2.1 Removing a
Board.
Step 3 Insert the new board into the subrack by referring to 7.2.2 Inserting a Board.
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7-11

BSC6900 GSM


The new board automatically loads program and configuration data, and the RUN LED blinks
every alternate 0.125s.
Step 4 Run the UIN BRD command to unblock the new board.
Step 5 Run the DSP BRD command to query the status of the new board.
If...

Then...

CPU status is Active normal,

Go to Step 7.

CPU status is not Active normal,

Go to Step 6.

Step 6 Check whether a board failure alarm is reported on the LMT.
If...

Then...

Alarms caused by a faulty board are
reported,

1. Identify and rectify the fault according to the
alarm information.
2. Go to Step 5.

No alarms caused by the faulty board are Go to Step 7.
reported,
Step 7 Run the CMP BRDVER command to check whether the software version of the new board is
consistent with the board version matching table.
If...

Then...

The board version is consistent with the
board version matching table,

Go to Step 8.

The board version is inconsistent with the 1. Ensure that the program files of the board in
the OMU active workspace installationbin
board version matching table,
fam on the OMU are correct. If the program
files are incorrect, contact Huawei
engineers.
2. Run the RST BRD command to reset the
board.
3. Go to Step 5.

NOTE

You can obtain the correct board version matching table from the version matching documents.

Step 8 Test the CS services by dialing and the PS services by browsing web pages to ensure that the
new board is functional.
----End
7-12


Issue 05 (2011-05-19)

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