Huawei RNC Site Maintenance Guide

RNC

V200R009

Site Maintenance Guide

Issue 03

Date 2007-11-30

Part Number 00352230

Huawei Technologies Proprietary

Huawei Technologies Co., Ltd. provides customers with comprehensive technical support and service. For anyassistance, please contact our local office or company headquarters.

Huawei Technologies Co., Ltd.Address: Huawei Industrial Base

Bantian, LonggangShenzhen 518129People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

Copyright © 2007 Huawei Technologies Co., Ltd. All rights reserved.No part of this document may be reproduced or transmitted in any form or by any means without prior writtenconsent of Huawei Technologies Co., Ltd. Trademarks and Permissions

and other Huawei trademarks are the property of Huawei Technologies Co., Ltd.All other trademarks and trade names mentioned in this document are the property of their respective holders. NoticeThe information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but the statements, information, andrecommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Proprietary

http://www.huawei.com

mailto:[email protected]

Contents

About This Document.....................................................................................................................1

1 Safety Information.....................................................................................................................1-11.1 Safety Precautions...........................................................................................................................................1-11.2 Electricity Safety.............................................................................................................................................1-31.3 Inflammable Environment...............................................................................................................................1-51.4 Battery.............................................................................................................................................................1-51.5 Radiation.........................................................................................................................................................1-71.6 Working at Heights.........................................................................................................................................1-91.7 Mechanical Safety.........................................................................................................................................1-111.8 Others............................................................................................................................................................1-12

2 RNC Site Maintenance Preparations......................................................................................2-12.1 RNC Site Maintenance Tool Preparations......................................................................................................2-22.2 RNC Spare Parts Preparations.........................................................................................................................2-2

3 RNC Routine Hardware Maintenance Items........................................................................3-13.1 RNC Equipment Room Maintenance Items....................................................................................................3-23.2 RNC Power Supply and the Grounding System Maintenance Items..............................................................3-23.3 RNC Cabinet Maintenance Items....................................................................................................................3-33.4 RNC Cable Maintenance Items.......................................................................................................................3-5

4 Putting On an ESD Wrist Strap...............................................................................................4-1

5 Powering On/Off the RNC Cabinet........................................................................................5-15.1 RNC Power Distribution Specifications.........................................................................................................5-25.2 Layout of Power Switches on the RNC Cabinet.............................................................................................5-25.3 Powering On the RNC Cabinet.......................................................................................................................5-45.4 Powering Off the RNC Cabinet in a Normal Situation...................................................................................5-65.5 Powering Off the RNC Cabinet in an Emergency..........................................................................................5-6

6 Cleaning a Fan Box.....................................................................................................................6-1

7 Cleaning an RNC Air Filter......................................................................................................7-17.1 Air Filters in the RNC Cabinet........................................................................................................................7-27.2 Cleaning the Air Filter at the RNC Cabinet Bottom (N68-22).......................................................................7-37.3 Cleaning the Air Filter at the RNC Cabinet Bottom (N68-21-N)...................................................................7-5

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7.4 Cleaning the Air Filters on the RNC Cabinet Doors.......................................................................................7-77.5 Replacing an RNC Air Filter...........................................................................................................................7-8

8 Replacing RNC Boards..............................................................................................................8-18.1 Safety Precautions of Board Operation ..........................................................................................................8-38.2 Procedures for Replacing an RNC Board.......................................................................................................8-3

8.2.1 Removing the RNC Board.....................................................................................................................8-38.2.2 Inserting the RNC Board........................................................................................................................8-68.2.3 Checking and Setting DIP Switches on RNC Subracks ........................................................................8-8

8.3 Replacing a WOPB Board...............................................................................................................................8-98.4 Replacing an MDMC Board.........................................................................................................................8-118.5 Replacing an AEUa Board............................................................................................................................8-138.6 Replacing an AOUa Board............................................................................................................................8-168.7 Replacing a CSUa Board...............................................................................................................................8-198.8 Replacing a DPUb Board..............................................................................................................................8-218.9 Replacing a PFCU Board..............................................................................................................................8-248.10 Replacing an FG2a Board...........................................................................................................................8-248.11 Replacing a GCUa/GCGa Board.................................................................................................................8-278.12 Replacing a GOUa Board............................................................................................................................8-308.13 Replacing an OMUa Board.........................................................................................................................8-338.14 Replacing a PEUa Board.............................................................................................................................8-378.15 Replacing an SCUa Board...........................................................................................................................8-408.16 Replacing an SPUa Board...........................................................................................................................8-438.17 Replacing a UOIa Board.............................................................................................................................8-468.18 Replacing an RNC Subrack.........................................................................................................................8-498.19 Replacing an RNC Power Distribution Box...............................................................................................8-518.20 Replacing an RNC Fan Box........................................................................................................................8-54

9 Replacing RNC Cables..............................................................................................................9-19.1 Cabling Specifications for RNC Signal Cables...............................................................................................9-29.2 Replacing an RNC Ethernet Cable..................................................................................................................9-69.3 Replacing an RNC Trunk Cable......................................................................................................................9-89.4 Replacing an RNC Optical Cable....................................................................................................................9-99.5 Replacing an RNC Clock Signal Cable.........................................................................................................9-119.6 Replacing an Alarm Box Signal Cable.........................................................................................................9-139.7 Replacing a Signal Monitoring Cable of the Power Distribution Box..........................................................9-14

10 Expanding the Capacity of the RNC...................................................................................10-110.1 Adding an SPM...........................................................................................................................................10-210.2 Adding an RBS Subrack.............................................................................................................................10-3

11 LEDs on RNC Boards............................................................................................................11-111.1 LEDs on the Front Panel of the RNC Power Distribution Box..................................................................11-311.2 LED on Fan Box.........................................................................................................................................11-311.3 LEDs on the OMUa Board..........................................................................................................................11-4

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11.4 LEDs on the CSUa Board...........................................................................................................................11-511.5 LEDs on the SCUa Board...........................................................................................................................11-611.6 LEDs on the SPUa Board............................................................................................................................11-611.7 LEDs on the DPUb Board...........................................................................................................................11-711.8 LEDs on the GCUa/GCGa Board...............................................................................................................11-811.9 LEDs on the AEUa Board...........................................................................................................................11-911.10 LEDs on the AOUa Board........................................................................................................................11-911.11 LEDs on the UOIa Board........................................................................................................................11-1011.12 LEDs on the PEUa Board........................................................................................................................11-1011.13 LEDs on the FG2a Board........................................................................................................................11-1111.14 LEDs on the GOUa Board......................................................................................................................11-12

12 DIP Switches on RNC Components...................................................................................12-112.1 DIP Switches on RNC Subracks.................................................................................................................12-212.2 DIP Switches on the AEUa Board..............................................................................................................12-312.3 DIP Switches on the AOUa Board..............................................................................................................12-612.4 DIP Switches on the PEUa Board...............................................................................................................12-812.5 DIP Switch on the MDMC Board.............................................................................................................12-1112.6 DIP Switches on the PFCU Board............................................................................................................12-12

13 RNC site maintenance record .............................................................................................13-1

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Figures

Figure 1-1 Wearing an ESD wrist strap...............................................................................................................1-5Figure 1-2 Lifting a weight................................................................................................................................1-10Figure 1-3 Slant angle........................................................................................................................................1-11Figure 1-4 One meter higher than the eave........................................................................................................1-11Figure 4-1 Wearing an ESD wrist strap...............................................................................................................4-1Figure 5-1 Assignment of power switches on the upper power distribution box.................................................5-3Figure 5-2 Assignment of power switches on the lower power distribution box.................................................5-3Figure 7-1 Air filters in the N68-22-N cabinet.....................................................................................................7-2Figure 7-2 Air filters in the N68-21-N cabinet.....................................................................................................7-3Figure 7-3 Removing the air filter from the bottom of the N68-22 cabinet ........................................................7-4Figure 7-4 Installing the air filter at the bottom of the N68-22 cabinet...............................................................7-5Figure 7-5 Pulling the air filter out of the bottom of the N68-21-N cabinet........................................................7-6Figure 7-6 Installing the air filter at the bottom of the N68-21-N cabinet...........................................................7-7Figure 8-1 Removing RNC boards.......................................................................................................................8-5Figure 8-2 Installing RNC boards........................................................................................................................8-7Figure 8-3 Replacing the WOPB board.............................................................................................................8-10Figure 8-4 Setting DIP switch S2 on the MDMC..............................................................................................8-11Figure 8-5 Replacing the MDMC Board............................................................................................................8-12Figure 8-6 Removing the OMUa board.............................................................................................................8-35Figure 8-7 Installing the OMUa board...............................................................................................................8-36Figure 8-8 Back panel of the power distribution box.........................................................................................8-52Figure 8-9 Setting the DIP switches on the PFCU.............................................................................................8-55Figure 8-10 Pulling out the fan box....................................................................................................................8-55Figure 9-1 Cable holes.........................................................................................................................................9-3Figure 9-2 Routing and binding trunk cables on cable ladder..............................................................................9-4Figure 9-3 Routing trunk cables up along the cable ladder..................................................................................9-4Figure 9-4 Routing signal cables from the cabinet to the cable ladder................................................................9-5Figure 9-5 Binding signal cables at bends............................................................................................................9-5Figure 10-1 Checking the configuration mode of subrack 0 .............................................................................10-5Figure 12-1 DIP switch......................................................................................................................................12-2Figure 12-2 DIP switches on the AEUa board...................................................................................................12-4Figure 12-3 DIP switches on the AOUa board...................................................................................................12-7Figure 12-4 DIP switches on the PEUa board....................................................................................................12-9

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Figure 12-5 DIP switch on the MDMC board..................................................................................................12-11Figure 12-6 DIP switch on the PFCU board....................................................................................................12-12

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Tables

Table 2-1 Items and Tools for RNC site maintenance.........................................................................................2-2Table 2-2 RNC spare parts preparations...............................................................................................................2-3Table 3-1 Maintenance items of the equipment room..........................................................................................3-2Table 3-2 Maintenance items of the power supplies and the grounding system..................................................3-2Table 3-3 Maintenance items of the cabinet ........................................................................................................3-4Table 3-4 Maintenance items of the cables..........................................................................................................3-5Table 5-1 Power distribution specifications for the RNC....................................................................................5-2Table 5-2 Assignment of power switches.............................................................................................................5-3Table 5-3 Checklist for the power supply to the cabinet components..................................................................5-4Table 5-4 Handling suggestions for power supply failures in the components....................................................5-5Table 8-1 Settings of DIP switches on subracks..................................................................................................8-8Table 8-2 Checklist for the replacement of the power distribution box.............................................................8-53Table 8-3 Address setting of the PFCU..............................................................................................................8-55Table 8-4 Checklist for the replacement of the fan box.....................................................................................8-56Table 9-1 Minimum bending radiuses of signal cables........................................................................................9-2Table 9-2 Checking the new cables......................................................................................................................9-7Table 9-3 Checklist for the replacement of the trunk cable .................................................................................9-9Table 9-4 Checklist for the replacement of the optical cable.............................................................................9-11Table 9-5 Checklist for the replacement of the clock signal cable ....................................................................9-12Table 9-6 Checklist for the replacement of the signal monitoring cable............................................................9-15Table 11-1 LEDs on the front panel of the power distribution box...................................................................11-3Table 11-2 LED on the fan box..........................................................................................................................11-3Table 11-3 LEDs on the OMUa board...............................................................................................................11-4Table 11-4 LEDs on the CSUa board.................................................................................................................11-5Table 11-5 LEDs on the SCUa board.................................................................................................................11-6Table 11-6 LEDs on the SPUa board.................................................................................................................11-7Table 11-7 LEDs on the DPUb board................................................................................................................11-7Table 11-8 LEDs on the GCUa/GCGa board.....................................................................................................11-8Table 11-9 LEDs on the AEUa board................................................................................................................11-9Table 11-10 LEDs on the AOUa board..............................................................................................................11-9Table 11-11 LEDs on the UOIa board..............................................................................................................11-10Table 11-12 LEDs on the PEUa board.............................................................................................................11-11Table 11-13 LEDs on the FG2a board..............................................................................................................11-11

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Table 11-14 LEDs on the GOUa board............................................................................................................11-12Table 12-1 Bits of the DIP switch......................................................................................................................12-2Table 12-2 Setting of DIP switches for RNC subracks......................................................................................12-3Table 12-3 DIP switches on the AEUa board.....................................................................................................12-5Table 12-4 DIP switches on the AOUa board....................................................................................................12-7Table 12-5 DIP switches on the PEUa board...................................................................................................12-10Table 12-6 DIP switch on the WDMB.............................................................................................................12-11Table 12-7 DIP switch on the PFCU board......................................................................................................12-12Table 13-1 RNC site maintenance record ..........................................................................................................13-1

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viii Huawei Technologies Proprietary Issue 03 (2007-11-30)

About This Document

PurposeThe model of the Huawei RNC is BSC6810. This document describes how to maintain thehardware of the RNC after the RNC commissioning. The maintenance items are routine sitemaintenance, RNC power-on and power-off, and parts replacement.

VersionsThe following table lists the product versions related to this document.

Product Name Versions

RNC V200R009

Intended AudienceThis document is intended for:

l Site maintainers

l System engineers

Change HistoryRefer to Changes in RNC Site Maintenance Guide.

Organization

1 Safety Information

2 RNC Site Maintenance Preparations

This part describes the preparations for the RNC site maintenance.

3 RNC Routine Hardware Maintenance Items

This part describes the maintenance items of the RNC equipment room and RNC hardware. Theitems of RNC routine hardware maintenance are those for the environment of the RNCequipment room, power supplies and the grounding system, cabinets, and cables.

4 Putting On an ESD Wrist Strap

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This part describes how to put on an ESD wrist strap. The ESD wrist strap, if grounded, canprotect the equipment from electrostatic discharge.

5 Powering On/Off the RNC Cabinet

This part describes how to power on and power off the RNC cabinet in a normal situation andto power off the RNC cabinet in an emergency. It also describes the power distributionspecifications for the RNC cabinet.

6 Cleaning a Fan Box

To ensure the long-term operation, the maintenance personnel must clean the fan box regularly,preferably once a year.

7 Cleaning an RNC Air Filter

The air filters protect the boards and the RNC from dust. Clean the air filter at least once everysix months.

8 Replacing RNC Boards

This part describes how to replace the boards in the RNC cabinet.

9 Replacing RNC Cables

This part describes how to replace the Ethernet cable, trunk cable, optical cable, alarm box signalcable, clock signal cable, and the signal monitoring cable of the power distribution box in theRNC.

10 Expanding the Capacity of the RNC

This part describes how to expand the capacity of the RNC. The capacity of the RNC can beexpanded by adding the RBS or SPM.

11 LEDs on RNC Boards

This part describes the LEDs on the panels of the power distribution boxes, fan box, and RNCboards.

12 DIP Switches on RNC Components

This part describes the DIP switches on the RNC subracks and RNC boards.

13 RNC site maintenance record

This part provides the record for RNC site maintenance.

Conventions

1. Symbol Conventions

The following symbols may be found in this document. They are defined as follows

Symbol Description

DANGERIndicates a hazard with a high level of risk that, if not avoided,will result in death or serious injury.

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2 Huawei Technologies Proprietary Issue 03 (2007-11-30)

Symbol Description

WARNINGIndicates a hazard with a medium or low level of risk which, ifnot avoided, could result in minor or moderate injury.

CAUTIONIndicates a potentially hazardous situation that, if not avoided,could cause equipment damage, data loss, and performancedegradation, or unexpected results.

TIP Indicates a tip that may help you solve a problem or save yourtime.

NOTE Provides additional information to emphasize or supplementimportant points of the main text.

2. General Conventions

Convention Description

Times New Roman Normal paragraphs are in Times New Roman.

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

Italic Book titles are in italics.

Courier New Terminal display is in Courier New.

3. Command Conventions


Boldface The keywords of a command line are in boldface.

Italic Command arguments are in italic.

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

{x | y | ...} Alternative items are grouped in braces and separated by verticalbars.One is selected.

[ x | y | ... ] Optional alternative items are grouped in square brackets andseparated by vertical bars.One or none is selected.

{ x | y | ... } * Alternative items are grouped in braces and separated by verticalbars.A minimum of one or a maximum of all can be selected.

[ x | y | ... ] * Alternative items are grouped in braces and separated by verticalbars.A minimum of zero or a maximum of all can be selected.

4. GUI Conventions

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Boldface Buttons,menus,parameters,tabs,window,and dialog titles are inboldface. For example,click OK.

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

5. Keyboard Operation


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

Key1+Key2 Press the keys concurrently.For example,pressing Ctrl+Alt+Ameans the three keys should be pressed concurrently.

Key1,Key2 Press the keys in turn.For example,pressing Alt,A means the twokeys should be pressed in turn.

6. Mouse Operation

Action Description

Click Select and release the primary mouse button without moving thepointer.

Double-click Press the primary mouse button twice continuously and quicklywithout moving the pointer.

Drag Press and hold the primary mouse button and move the pointerto a certain position.

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4 Huawei Technologies Proprietary Issue 03 (2007-11-30)

1 Safety Information

1.1 Safety PrecautionsThis section describes certain safety precautions and helps to choose the measurement deviceand testing device. Read and follow these safety precautions before installing, operating, andmaintaining Huawei devices.

Following All Safety Precautions

Before any operation, read the instructions and precautions in this document carefully tominimize the possibility of accidents.

The Danger, Caution, and Note items in the package of documents do not cover all the safetyprecautions that must be followed. They only provide the generic safety precautions foroperations.

Symbols

DANGERThis symbol indicates that casualty or serious accident may occur if you ignore the safetyinstruction.

CAUTIONThis symbol indicates that serious or major injury may occur if you ignore the safety instruction.

NOTE

This symbol indicates that the operation may be easier if you pay attention to the safety instruction.

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Complying with the Local Safety Regulations

When operating the device, comply with the local safety regulations. The safety precautionsprovided in the documents are supplementary. You must comply with the local safetyregulations.

General Installation Requirements

The personnel in charge of installation and maintenance must be trained and master the correctoperating methods and safety precautions before beginning work.

The rules for installing and maintaining the device are as follows:

l Only the trained and qualified personnel can install, operate and maintain the device.

l Only the qualified specialists are allowed to remove the safety facilities, and repair thedevice.

l Any replacement of the device or part of the device (including the software) or any changemade to the device must be performed by qualified or authorized personnel of Huawei.

l Any fault or error that might cause safety problems must be reported immediately to thepersonnel in charge.

Grounding Requirements

The following requirements are applicable to the device to be grounded:

l Ground the device before installation and remove the ground cable after uninstallation.

l Do not operate the device in the absence of a ground conductor. Do not damage the groundconductor.

l The unit (or system) must be permanently connected to the protection ground beforeoperation. Check the electrical connection of the device before operation and ensure thatthe device is reliably grounded.

Safety of Personnel

Ensure the following:

l When lightning strikes, do not operate the device and cables.

l When lightning strikes, unplug the AC power connector. Do not use the fixed terminal ortouch the terminal or antenna connector.

NOTE

The previous two requirements are suitable for the wireless fixed terminal.

l To prevent electric shock, do not connect safety extra-low voltage (SELV) circuits totelecommunication network voltage (TNV) circuits.

l To prevent laser radiation from injuring your eyes, never look into the optical fiber outletwith unaided eyes.

l To prevent electric shock and burns, wear the electrostatic discharge (ESD) clothing, glovesand wrist strap, and remove conductors such as jewelry and watch before operation.

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Device Safetyl Before operation, the device must be secured on the floor or other fixed objects, such as

the walls and the mounting racks.l Do not block ventilation openings while the system is running.

l When installing the panel, tighten the screw with the tool.

1.2 Electricity Safety

High Voltage

DANGERl The high voltage power supply provides power for running the system. Direct contact with

the high voltage power supply or contact through damp objects may result in fatal danger.l Non-standard and improper high voltage operations may result in fire and electric shock.

l The personnel who install the AC facility must be qualified to perform operations on highvoltage and AC power supply facilities.

l When installing the AC power supply facility, follow the local safety regulations.

l When operating the AC power supply facility, follow the local safety regulations.

l When operating the high voltage and AC power supply facilities, use the specific toolsinstead of common tools.

l When the operation is performed in a damp environment, ensure that water is kept off thedevice. If the cabinet is damp or wet, shut down the power supply immediately.

ThunderstormThe following requirements are suitable only for the wireless base station or the device with anantenna or GPS antenna.

DANGERIn a thunderstorm, do not perform operations on high voltage and AC power supply facilities oron a steel tower and mast.

High Electrical Leakage

CAUTIONGround the device before powering on the device. Otherwise, the personnel and device are indanger.



If the "high electrical leakage" flag is stuck to the power terminal of the device, you must groundthe device before powering it on.

Power Cable

CAUTIONDo not install and remove the power cable with a live line. Transient contact between the coreof the power cable and the conductor may generate electric arc or spark, which may cause fireor eye injury.

l Before installing or removing the power cable, turn off the power switch.

l Before connecting the power cable, ensure that the power cable and label comply with therequirements of the actual installation.

Fuse

CAUTIONTo ensure that the system runs safely, when a fuse blows, replace it with a fuse of the same typeand specifications.

Electrostatic Discharge

CAUTIONThe static electricity generated by the human body may damage the electrostatic sensitivecomponents on the circuit board, such as the large-scale integrated circuit (LIC).

In the following situations, the human body generates a static electromagnetic field:

l Movement of body parts

l Clothes friction

l Friction between shoes and the ground

l Holding plastic in hand

The static electromagnetic field will remain within the human body for a long time.

Before contacting the device, plug boards, circuit boards, and application specific integratedcircuits (ASICs), wear a grounded ESD wrist strap. It can prevent the sensitive components frombeing damaged by the static electricity in the human body.

Figure 1-1shows how to wear an ESD wrist strap.




Figure 1-1 Wearing an ESD wrist strap

1.3 Inflammable Environment

DANGERDo not place the device in the environment that has inflammable and explosive air or fog. Donot perform any operation in this environment.

Any operation of the electrical device in the inflammable environment causes danger.

1.4 Battery

Storage Battery

DANGERBefore handling the storage battery, read the safety precautions for the handling and connectionof the storage battery.

Incorrect operation of storage batteries may cause danger. During operation, ensure thefollowing:

l Prevent any short-circuit.

l Prevent the electrolyte from overflowing and leakage.

Electrolyte overflow may damage the device. It will corrode the metal parts and the circuitboards, and ultimately damage the device and cause short-circuit of the circuit boards.



General Operations

Before installing and maintaining the storage battery, ensure the following:

l Use special insulation tools.

l Use eye protection devices and operate with care.

l Wear rubber gloves and an apron in case of an electrolyte overflow.

l Always keep the battery upright when moving. Do not place the battery upside down or tiltit.

Short-Circuit

DANGERShort-circuit of the battery may cause injury. Although the voltage of a battery is low, hightransient current generated by short-circuit will release a surge of power.

Keep metal objects away from the battery to prevent short circuit. If they have to be used,disconnect the battery in use before performing any other operation.

Harmful Gas

CAUTIONl Do not use unsealed lead-acid storage batteries, because the gas emitted from it may result

in fire or device corrosion.

l Lay the storage battery horizontally and fix it properly.

The lead-acid storage battery in use will emit flammable gas. Therefore, store it in a place withgood ventilation and take precautions against fire.

High Temperature

CAUTIONHigh temperature may result in distortion, damage, and electrolyte overflow of the battery.

When the temperature of the battery exceeds 60oC, check whether there is acid overflow. If acidoverflow occurs, handle the acid immediately.




Acid

CAUTIONIf the acid overflows, it should be absorbed and neutralized immediately.

When handling a leaky battery, protect against the possible damage caused by the acid. Use thefollowing materials to absorb and neutralize acid spills:

l Sodium bicarbonate (baking soda): NaHCO3

l Sodium carbonate (soda): Na2CO3

Antacids must be used according to the instructions provided by the battery manufacturer.

Lithium Battery

CAUTIONThere is danger of explosion if the battery is incorrectly replaced.

l Replace the lithium battery with the same or equivalent type recommended by themanufacturer.

l Dispose of the used battery according to the instructions provided by the manufacturer.

l Do not dispose of the lithium battery in fire.

1.5 Radiation

Electromagnetic Field Exposure

CAUTIONHigh power radio-frequency signals are harmful to human body.

Before installing or maintaining an antenna on a steel tower or mast with a large number oftransmitter antennas, the operator should coordinate with all parties to ensure that the transmitterantennas are shut down.

The base transceiver station (BTS) has RF radiation (radiation hazard). Suggestions for theinstallation and operation of BTSs are given in the following section. Operators are also requiredto comply with the related local regulations on erecting BTSs.

l The antenna should be located in an area that is inaccessible to the public where the RFradiation exceeds the stipulated value.



l If the areas where RF radiation exceeds the stipulated value are accessible to workers,ensure that workers know where these areas are. They can shut down the transmitters beforeentering these areas. Such areas may not exist; but if they exist, the areas must be within arange of less than 10 m around the antennas.

l Each forbidden zone should be indicated by a physical barrier and striking sign to warn thepublic or workers.

Laser

CAUTIONWhen handling optical fibers, do not stand close to, or look into the optical fiber outlet withunaided eyes.

Laser transceivers or transmitters are used in the optical transmission system and associated testtools. Because the laser that is transmitted through the optical fiber produces a small beam oflight, it has a very high power density and is invisible to human eyes. If a beam of light entersthe eye, the retina may be damaged.

Normally, staring into the end of an unterminated optical fiber or broken optical fiber with theunaided eyes from a distance of more than 150 mm [5.91 in.] will not cause eye injury. Eyesmay, however, be damaged if an optical tool such as a microscope, magnifying glass or eyeloupe is used to stare into the bare optical fiber end.

Read the following guidelines to prevent laser radiation:

l Only the trained and authorized personnel can perform the operation.

l Wear a pair of eye-protective glasses when you are handling lasers or optical fibers.

l Ensure that the optical source is switched off before disconnecting optical fiber connectors.

l Never look into the end of an exposed optical fiber or an open connector if you cannotensure that the optical source is switched off.

l To ensure that the optical source is switched off, use an optical power meter.

l Before opening the front door of an optical transmission system, ensure that you are notexposed to laser radiation.

l Never use an optical tool such as a microscope, a magnifying glass, or an eye loupe to lookinto the optical fiber connector or end.

Read the following instructions before handling optical fibers:

l Only the trained personnel can cut and splice optical fibers.

l Before cutting or splicing an optical fiber, ensure that the optical fiber is disconnected fromthe optical source. After disconnecting the optical fiber, use protecting caps to protect allthe optical connectors.




1.6 Working at Heights

CAUTIONWhen working at heights, ensure that the objects do not fall.

When working at heights, ensure that the following requirements must be met:

l The personnel who work at heights must be trained.

l The operating machines and tools should be carried and handled safely to prevent themfrom falling.

l Safety measures, such as wearing a helmet and a safety belt, should be taken.

l In cold regions, warm clothes should be worn before working at heights.

l Ensure that the lifting appliances are well prepared for working at heights.

Lifting Weights

CAUTIONDo not access the areas under the arm of the crane and the goods in suspension when liftingweights.

l Ensure that the operators have been trained and qualified.

l Check the weight lifting tools and ensure that they are intact.

l Lift the weight only when the weight lifting tools are firmly mounted onto the weight-bearing object or the wall.

l Use a concise instruction to prevent incorrect operation.

l The angle between the two cables should be less than or equal to 90o in the lifting of weights(See Figure 1-2).



Figure 1-2 Lifting a weight

Safety Guide on Ladder UseChecking the Ladder

l Check the ladder before using it. Check the maximum weight that the ladder can support.

l Never overload the ladder.

Placing the Ladder

l The slant angle is preferred to be 75o. The slant can be measured with the angle square orwith arms, as shown in Figure 1-3. When using a ladder, place the wider end of the ladderon the ground and take protective measures on the base of the ladder against slippage. Placethe ladder on a stable ground.

When climbing the ladder, ensure the following:

l The gravity of the body does not shift from the edge of the ladder.

l Keep balance on the ladder before performing any operation.

l Do not climb higher than the fourth highest step of the ladder.

If you tend to climb to the roof, the length of the ladder should be at least one meter higher thanthe eave, as shown in Figure 1-4.




Figure 1-3 Slant angle

Figure 1-4 One meter higher than the eave

1.7 Mechanical Safety

Drilling

CAUTIONDo not drill on the cabinet without permission. Inappropriate drilling on the cabinet may damagethe electromagnetic shielding and internal cables. Metal shavings from the drilling may resultin a short-circuit of the circuit board if they get into the cabinet.

l Before drilling a hole on the cabinet, remove the cables from the cabinet.

l During the drilling, wear blinkers to protect your eyes.



l During the drilling, wear the protective gloves.

l Prevent the metal shavings from getting into the cabinet. After drilling, clean the metalshavings in time.

Handling Sharp Objects

CAUTIONWhen carrying the device by hand, wear the protective gloves to prevent injury by sharp objects.

Handling Fansl When replacing a component, place the component, screw, and tool at a safe place to prevent

them from falling into the running fan.l When replacing the ambient equipment around the fan, do not place the finger or board

into the running fan until the fan is switched off and stops running.

Moving Heavy ObjectsWear the protective gloves when moving heavy objects.

CAUTIONl Be careful when moving heavy objects.

l When moving the chassis outwards, be aware about the unfixed or heavy objects on thechassis to prevent injury.

l Two persons should be available to move a chassis; one person must not move a heavychassis. When moving a chassis, keep your back straight and move stably to prevent asprain.

l When moving or lifting a chassis, hold the handle or bottom of the chassis. Do not hold thehandle of the installed modules in the chassis, such as the power module, fan module, orboard.

1.8 Others

Inserting and Removing a Board

CAUTIONWhen inserting a board, wear the ESD wrist strap or gloves. Insert the board gently to preventany bent pins on the backplane.




l Insert the board along the guide rail.

l Avoid contact of one board with another to prevent short-circuit or damage.

l Do not remove the active board before powering off.

l When holding a board in hand, do not touch the board circuit, components, connectors, orconnection slots.

Bundling Signal Cables

CAUTIONBundle the signal cables separately from the strong current cables or high voltage cables.

Cabling RequirementsAt a very low temperature, movement of the cable may damage the plastic skin of the cable. Toensure the construction safety, comply with the following requirements:

l When installing cables, ensure that the environment temperature is above 0oC.

l If cables are stored in the place below 0oC, move the cables into a place at a roomtemperature and store the cables for more than 24 hours before installation.

l Move the cables with care, especially at a low temperature. Do not drop the cables directlyfrom the vehicle.



2 RNC Site Maintenance Preparations

About This Chapter

This part describes the preparations for the RNC site maintenance.

2.1 RNC Site Maintenance Tool PreparationsThis part lists the tools that should be prepared for the RNC site maintenance.

2.2 RNC Spare Parts PreparationsThis part describes the spare parts that should be prepared for the RNC site maintenance.

RNCSite Maintenance Guide 2 RNC Site Maintenance Preparations


2.1 RNC Site Maintenance Tool PreparationsThis part lists the tools that should be prepared for the RNC site maintenance.

Table 2-1 lists the items and tools for RNC site maintenance.

Table 2-1 Items and Tools for RNC site maintenance

Item Tools

Cleaning the fanbox

ESD wrist strap, cross screwdriver, ESD soft brush, vacuum cleaner,and dry clean cloth

Cleaning the airfilter

ESD wrist strap, cross screwdriver, and dry clean cloth

Replacing theboards

ESD wrist strap, cross screwdriver, straight screwdriver, ESD box orbag, dustfree cotton cloth, and fiber cleaner

Replacing thesubrack, fan box,or powerdistribution box

ESD wrist strap, cross screwdriver, straight screwdriver, ESD box orbag, diagonal pliers, dustfree cotton cloth, and fiber cleaner

Replacing thecables

ESD wrist strap, Ethernet cable tester, Ethernet cable pliers, straightscrewdriver, dustfree cotton cloth, fiber cleaner, ESD gloves, anddiagonal pliers

2.2 RNC Spare Parts PreparationsThis part describes the spare parts that should be prepared for the RNC site maintenance.

Principles for Spare Parts PreparationsThe principles for RNC spare parts preparations are described as follows:

l If some types of boards do not work in active/standby mode, the priority for spare partspreparations is high. Any faults in these boards may affect related services.

l If some types of boards work in active/standby mode, the priority for spare partspreparations is low. When such a board is faulty, the standby board becomes active, whichdoes not affect the services.

l If some types of boards such as DPUb work in a resource pool, the priority for spare partspreparations is medium. When such a board is faulty, the services may not be interruptedbut the system performance degrades.

l The filler panel is used to form a ventilation loop and ensures the electromagnetic fieldingand pleasant appearance of the cabinet. The priority of the filler panel for spare partspreparation is medium.

Suggestions for Spare Parts PreparationsTable 2-2 describes the suggestions for the spare parts preparations.

2 RNC Site Maintenance PreparationsRNC



Table 2-2 RNC spare parts preparations

Spare Parts Quantity

Fan box One for each office

Filler panel Two for each office

Boards SCUa, DPUb, SPUa, GCUa/GCGa, and OMUa (one for each office)AEUa, AOUa, UOIa, PEUa, FG2a, and GOUa (one for each office,depending on office configuration)

Optical module One for each office if the module is configured

OMUa hard disk One for each office

NOTE

The number of spare parts to be applied for depends on the office configuration and the spare partsconfiguration model.

RNCSite Maintenance Guide 2 RNC Site Maintenance Preparations


3 RNC Routine Hardware Maintenance Items

About This Chapter

This part describes the maintenance items of the RNC equipment room and RNC hardware. Theitems of RNC routine hardware maintenance are those for the environment of the RNCequipment room, power supplies and the grounding system, cabinets, and cables.

3.1 RNC Equipment Room Maintenance ItemsThis part lists the maintenance items of the RNC equipment room.

3.2 RNC Power Supply and the Grounding System Maintenance ItemsThis part lists the maintenance items of the RNC power supplies and the grounding system.

3.3 RNC Cabinet Maintenance ItemsThis part lists the maintenance items of the RNC cabinet.

3.4 RNC Cable Maintenance ItemsThis part describes the maintenance items of the RNC cables.

RNCSite Maintenance Guide 3 RNC Routine Hardware Maintenance Items


3.1 RNC Equipment Room Maintenance ItemsThis part lists the maintenance items of the RNC equipment room.

Table 3-1 lists the maintenance items of the equipment room.

Table 3-1 Maintenance items of the equipment room

Item Period Action Reference Standards

Environment Daily

Check whether the alarmsrelated to power supply,fire, water, and smoke arereported in the equipmentroom.

No such alarms arereported.

Anti-theftdevices suchas door andwindow

DailyCheck the anti-theftdevices such as door andwindow.

The anti-theft devices suchas door and window are ingood condition.

Temperature Daily Check the temperature inthe equipment room.

The temperature staysbetween 15°C and 30°C.

Humidity Daily Check the humidity in theequipment room.

The humidity staysbetween 40% and 65%.

Indoor airconditioner Daily

Check the operations theair conditioner such ascooling, heating, andswitches.

The air conditioner worksproperly. The temperatureread from the airconditioner is consistentwith that on thethermometer.

3.2 RNC Power Supply and the Grounding SystemMaintenance Items

This part lists the maintenance items of the RNC power supplies and the grounding system.

Table 3-2 lists the maintenance items of the power supplies and the grounding system.

Table 3-2 Maintenance items of the power supplies and the grounding system


Power cables Monthly orquarterly

Check all –48 Vpower cables andGND cables.

l The power cables are securelyand properly connected.

l The power cables are not aging,and there is no corrosion on thejoints.

3 RNC Routine Hardware Maintenance ItemsRNC




Voltage Monthly orquarterly

Measure thevoltage of thepower supply byusing amultimeter.

The voltage of the power supplystays within the standard voltagerange. For details, refer to 5.1 RNCPower DistributionSpecifications.

PGND cables Monthly orquarterly

Check whether thePGND cables andgrounding bars areconnectedproperly.

l The connection points are safeand sound, and there is nocorrosion on the joints.

l The PGND cables are not aging.

l Proper anti-corrosive measuresare applied and the groundingbars are not corroded.

Groundingstate ofcomponentsinside thecabinet

Monthly orquarterly

l Check the GNDcables in thecabinet.

l Check theconnectionterminals andretentionscrews of all theGND cables.

l The GND cables are not aging,damaged, corroded, or burnt.

l The wiring terminals andretention screws are securelyand reliably connected withoutany corrosion.

Groundingresistance

Monthly orquarterly

Measure thegroundingresistance by usinga resistance testerand record thevalues.

The grounding resistance is lessthan 10 ohms.

Batteries andrectifier Yearly

Check the batteryand rectifier in thepower supplysystem of eachequipment room.

l The capacity of all batteriesmeets the requirements and theconnections of the batteries arecorrect.

l The specifications for therectifiers meet the requirement.

3.3 RNC Cabinet Maintenance ItemsThis part lists the maintenance items of the RNC cabinet.

Table 3-3 lists the maintenance items of the cabinet and related actions.



Table 3-3 Maintenance items of the cabinet


FansWeekly,monthly orquarterly

Check the operation of thefans.

The fan works properlywithout makingexceptional sounds.

Air filters of thecabinet Quarterly Check the air filters of

each cabinet.

There is no apparent dust ordamage on the air filters.Clean the dirty air filteraccording to 7 Cleaning anRNC Air Filter. Replacethe damaged air filteraccording to 7.5 Replacingan RNC Air Filter.

Cabinet surface Monthly orquarterly

Check the cabinet surfaceand the cabinet labels.

There is no damage on thecabinet surface. The labelsare legible.

Locks anddoors on thecabinet

Monthly orquarterly

Check whether the lockand doors works properly.

The locks and the doors onthe cabinet work properly.

Cabinetcleanness

Monthly orquarterly

Check whether eachcabinet is clean.

The cabinet surface isclean. There is no apparentdust inside the cabinet.

Fan boxcleanness Yearly

Clean the fan boxaccording to 6 Cleaning aFan Box.

There is no obvious dust ordamage on the surface orinside each fan box.

Cabinetcomponents

Monthly orquarterly

Check the rat guard netand the LEDs. For detailsabout the LEDs, refer tothe 11 LEDs on RNCBoards.

l The rat guard net is ingood condition.

l The LEDs show thateach part is in goodcondition.

ESD wrist strap Quarterly

Use either way below:l Use the ESD wrist strap

tester.l Measure the grounding

resistance by using themultimeter.

l When you use the ESDwrist strap tester, theGOOD LED lights.

l When you use themultimeter, thegrounding resistance ofthe ESD wrist strapranges from 0.8 to 1.2megaohms.

Idle opticalports on boards

Monthly orquarterly

Check the dustproof capson the idle optical ports.

There are dustproof caps onthe idle optical ports.

3 RNC Routine Hardware Maintenance ItemsRNC



3.4 RNC Cable Maintenance ItemsThis part describes the maintenance items of the RNC cables.

Table 3-4 describes the maintenance items of the cables and related actions.

Table 3-4 Maintenance items of the cables


Cable labels Weekly Check all the cablelabels.

The labels on the cables arelegible.

Connectors andsockets

Monthly orquarterly

Check whether there isdust or oil on theinsulators of theconnectors or thesockets.

The insulators of theconnectors or the socketsare clean.

Connections ofthe trunk cables Yearly Check the connections

the of trunk cables.

l The trunk cables areproperly connected.

l The trunk cables areintact.

l The labels on the cablesare legible.

Connections ofthe Ethernetcables

Yearly Check the connectionsof the Ethernet cables.

l The Ethernet cables areproperly connected.

l The Ethernet cables areintact.

l The LAN switch isintact.


Connections ofthe opticalcables

Yearly Check the connectionsof the optical cables.

l The optical cables areproperly connected.

l The optical cables areintact.




4 Putting On an ESD Wrist Strap

This part describes how to put on an ESD wrist strap. The ESD wrist strap, if grounded, canprotect the equipment from electrostatic discharge.

Contextl Put on the ESD wrist strap and ensure that it is in proper contact with your skin. Insert the

strap plug into the ESD connector, as shown in Figure 4-1.l Ensure that the ESD wrist strap is functional and that its impedance stays in the range 0.8

to 1.2 megaohms. Typically, the service life of an ESD wrist strap is two years. When theimpedance of the ESD wrist strap does not meet the requirements, replace it with a newone.

l The ESD wrist strap cannot prevent electrostatic discharge that is generated by the contactbetween your clothes and boards. Prevent your clothes from contact with boards.

ProcedureStep 1 Correctly put on the ESD wrist strap.

Step 2 Insert the strap plug into the ESD connector on the cabinet, as shown in Figure 4-1.

Figure 4-1 Wearing an ESD wrist strap

1 ESD connector 2 Plug 3 ESD wrist strap

RNCSite Maintenance Guide 4 Putting On an ESD Wrist Strap


NOTE

You may plug the ESD wrist strap into one of the two ESD connectors on the cabinet, as shown in parts(1) and (2) of Figure 4-1.

----End

4 Putting On an ESD Wrist StrapRNC



5 Powering On/Off the RNC Cabinet

About This Chapter

This part describes how to power on and power off the RNC cabinet in a normal situation andto power off the RNC cabinet in an emergency. It also describes the power distributionspecifications for the RNC cabinet.

5.1 RNC Power Distribution SpecificationsThe RNC works with DC power. This part describes the specifications for the input power ofthe RNC cabinet and the output power of the power distribution box.

5.2 Layout of Power Switches on the RNC CabinetThe two power distribution boxes installed on top of the RNC cabinet provide 12 output powersupplies for the RNC components. The serving relationship between the power supplies and thecomponents is fixed.

5.3 Powering On the RNC CabinetThis part describes how to power on the RNC cabinet and handle the power supply failures ofthe components in the cabinet.

5.4 Powering Off the RNC Cabinet in a Normal SituationThe RNC must be powered off when you move the equipment or anticipate a territorial blackout.If the RNC is powered off, all its services may be interrupted. Therefore, be cautious when youpower off the RNC.

5.5 Powering Off the RNC Cabinet in an EmergencyThe RNC must be powered off in an emergency, such as fire, smoke, or water immersion.

RNCSite Maintenance Guide 5 Powering On/Off the RNC Cabinet


5.1 RNC Power Distribution SpecificationsThe RNC works with DC power. This part describes the specifications for the input power ofthe RNC cabinet and the output power of the power distribution box.

Table 5-1 lists the specifications for the input power of the RNC cabinet and the output powerof the power distribution box.

Table 5-1 Power distribution specifications for the RNC

Item Specifications

Input powerof the RNCcabinet

Rated input voltage –48 V

Input voltage range –40 V to –57 V

Input mode Two –48 V inputs for 1+1 hot backup

Maximum inputcurrent 100 A for a single input

Output of thepowerdistributionbox

Rated outputvoltage –48 V

Output voltagerange –40 V to –57 V

Rated output power 4800 W in the –48 V input mode

Outputs

l Six independent –48 V power outputs come fromSW1 to SW6 and the rated current of a single outputis 70 A.

l The overcurrent protection point for a single outputis 87.5 A. You need to manually restore the MCBwork state after the overcurrent protection.

5.2 Layout of Power Switches on the RNC CabinetThe two power distribution boxes installed on top of the RNC cabinet provide 12 output powersupplies for the RNC components. The serving relationship between the power supplies and thecomponents is fixed.

One power distribution box has six power switches to control the six power supplies it outputs.The six power switches are SW1, SW2, SW3, SW4, SW5, and SW6. The label on the front panelof the power distribution box tells the serving relationship between the switches and the RNCcomponents, as shown in Figure 5-1 and Figure 5-2. For detailed information, refer to Table5-2.

5 Powering On/Off the RNC CabinetRNC



Figure 5-1 Assignment of power switches on the upper power distribution box

Figure 5-2 Assignment of power switches on the lower power distribution box

Table 5-2 Assignment of power switches

RNC Components Power Switches

Subrack 2, subrack 5 SW1 and SW4 on the upper power distribution box

Subrack 1, subrack 4 SW2 and SW5 on the lower power distribution box

Subrack 0, subrack 3 SW3 and SW6 on the lower power distribution box



5.3 Powering On the RNC CabinetThis part describes how to power on the RNC cabinet and handle the power supply failures ofthe components in the cabinet.

Prerequisitel The input power cables are correctly and securely connected. The jackets of the power

cables are intact.l The specifications for the input power of the RNC cabinet and the output power of the

power distribution box comply with the specifications, as described in 5.1 RNC PowerDistribution Specifications.

l All the switches numbered from SW1 to SW6 on the power distribution box are set toOFF.

Procedure

Step 1 Set the switches that control the RNC power supply on the Power Distribution Frame (PDF) toON.

Step 2 When the RUN LED on the front panel of the power distribution box blinks every 0.25 seconds(0.25 s ON and 0.25 s OFF), set the switches on the configured RSS and RBS subracks to ON.For the function of each switch, refer to the label on the front panel of the power distributionbox, as shown in 5.2 Layout of Power Switches on the RNC Cabinet.

NOTE

The unused switches on the two power distribution boxes are always set to OFF.

Step 3 Check the power supply of the components in the cabinet, as listed in Table 5-3.

Table 5-3 Checklist for the power supply to the cabinet components

Component LED for Power Supply

Board The RUN LED on the board panel is ON or blinks.

Fan box The green STATUS LED on the fan box panel blinks every onesecond (1 s ON and 1 s Off) after the subrack is powered on.

Step 4 If a power supply failure in the components occurs after the cabinet is powered on, check theitems, as listed in Table 5-4.




Table 5-4 Handling suggestions for power supply failures in the components

Failure Type Handling Suggestion

Power supply failuresin all the components

Check whether the GND cables and the –48 V power cables areconnected properly.l If the connections are wrong, set all the switches on the power

distribution box to OFF. Then reconnect the power cables.l If the connections are correct, replace the WOPB, an overvoltage

protection board for the power distribution box. If the failurepersists, replace the power distribution box.

Power supply failuresin all the boards in asubrack

Use the multimeter to measure the input voltage of the subrack.l If the input voltage stays between –57 V and –40 V, replace the

subrack.l If the input power is abnormal, check the connections of power

cables. If the connections are loose, set all the switches on thepower distribution box to OFF and then reconnect the powercables. If the connections are proper, replace the power distributionbox because the switches on the power distribution box may befaulty.

Power supply failuresin a board in thesubrack

Check the items as follows:1. Pull out the board and check whether the pins in the sockets on the

backplane are distorted, broken, or missing. If yes, replace thesubrack.

2. Insert the board into the slot and check the LED on the board.3. If the LED is not functional, pull out the board and insert it into an

empty slot that can house the same type of board. Then check theLED as follows:l If the board works properly, you can infer that the slot is faulty.

Replace the subrack.l If the board does not work properly, replace the board.

Power supply failuresin the fan box

Use the multimeter to measure the input voltage of the faulty fan box.l If the input voltage stays between –40 V and –57 V, replace the

fan box.l If the input power is abnormal, check the connections of power

cables. If the connections are loose, set all the switches on thepower distribution box to OFF and then reconnect the powercables. If the connections are proper, replace the power distributionbox because the switches on it may be faulty.

----End



5.4 Powering Off the RNC Cabinet in a Normal SituationThe RNC must be powered off when you move the equipment or anticipate a territorial blackout.If the RNC is powered off, all its services may be interrupted. Therefore, be cautious when youpower off the RNC.

PrerequisiteThe data of the RNC is Backing Up RNC Data.

ContextTo lower the negative effect on the RNC, power off the RBR at first, and then power off theRSR.

Procedure

Step 1 According to the subrack configuration of the RBR, set switches SW1 to SW6 on the powerdistribution box to OFF in sequence.

Step 2 Turn outwards the ejector levers on the OMUa, as shown in part (1) of Removing the OMUaboard.Repeat this step if there are two OMUa boards.

Step 3 After the OFFLINE LED on the OMUa is ON steadily, set switches SW1 to SW6 on the powerdistribution box to OFF according to the subrack configuration of the RSR.

Step 4 Turn inwards the ejector levers on the OMUa until they are in position, as shown in part (2) ofInstalling the OMUa board.

Step 5 Set the switches that control the RNC power supply on the PDF to OFF.

----End

5.5 Powering Off the RNC Cabinet in an EmergencyThe RNC must be powered off in an emergency, such as fire, smoke, or water immersion.

Procedure

Step 1 Set all the switches on the power distribution boxes of the RNC to OFF.

Step 2 If time permits, set the switches that control the RNC power supply on the PDF to OFF.

----End




6 Cleaning a Fan Box

To ensure the long-term operation, the maintenance personnel must clean the fan box regularly,preferably once a year.

Prerequisitel The tools for cleaning the fan box are ready. The tools are ESD wrist strap, cotton cloth,

ESD soft brush, vacuum cleaner, and cross screwdriver.

l The spare fan boxes are ready.

Context

CAUTIONThe replacement of the fan box severely affects the heat dissipation of the RNC, you shouldreplace the fan box as quickly as possible. The recommended time is shorter than one minute.If the replacement takes a longer time, the boards may be damaged due to a high temperature.

CAUTIONPut on an ESD wrist strap and ensure that it is properly connected to the ESD connector on thecabinet.

Procedure

Step 1 Clean the new fan box by using the clean cotton cloth, ESD soft brush, and vacuum cleaner.

Step 2 Open the front door of the cabinet. Use a cross screwdriver to loosen the two captive screws onthe fan box.

Step 3 Take the fan box out of the cabinet.

RNCSite Maintenance Guide 6 Cleaning a Fan Box


CAUTIONWhen replacing the fan box, do not reach your hand into the fan box. The rotation of the fanblades or the metal projections on the fan may hurt your hand.

Step 4 Install the new fan box into the cabinet. Use the captive screws to fix the fan box.

Step 5 Clean the removed fan box by using the cotton cloth, ESD soft brush, and vacuum cleaner. Thecleaned fan boxes are used as spare parts.

Step 6 Repeat steps Step 2 through Step 5 to replace the other fan boxes.

----End

6 Cleaning a Fan BoxRNC



7 Cleaning an RNC Air Filter

About This Chapter

The air filters protect the boards and the RNC from dust. Clean the air filter at least once everysix months.

7.1 Air Filters in the RNC CabinetThe air filters are installed on the front door, at the inner side of back doors, and at the bottomof the cabinet. The locations of the air filters are different in the N68-22 and N68-21-N cabinets.

7.2 Cleaning the Air Filter at the RNC Cabinet Bottom (N68-22)This part describes how to clean the air filter at the bottom of the RNC N68-22 cabinet. Themaintenance personnel should clean the air filter at the bottom of the cabinet regularly or at leastonce every quarter.

7.3 Cleaning the Air Filter at the RNC Cabinet Bottom (N68-21-N)This part describes how to clean the air filter at the bottom of the N68-21-N cabinet. Themaintenance personnel should clean the air filter at the bottom of the cabinet regularly or at leastonce every quarter.

7.4 Cleaning the Air Filters on the RNC Cabinet DoorsThis part describes how to clean the air filters on the inner sides of the two doors regularly,preferably once a quarter. The same procedures are performed when you clean the air filters onthe N68-22 cabinet doors and those on the N68-21-N cabinet doors.

7.5 Replacing an RNC Air FilterWhen an RNC air filter is worn out, replace the air filter. It takes about five minutes to replacethe air filter.

RNCSite Maintenance Guide 7 Cleaning an RNC Air Filter


7.1 Air Filters in the RNC CabinetThe air filters are installed on the front door, at the inner side of back doors, and at the bottomof the cabinet. The locations of the air filters are different in the N68-22 and N68-21-N cabinets.

Air Filters In the N68-22 Cabinet

Figure 7-1 shows the air filters in the N68-22 cabinet.

Figure 7-1 Air filters in the N68-22-N cabinet

NOTE

The white air filter at the bottom of the cabinet is fixed on the rack by using screws. The black filters arefixed on the cabinet by using zig wires.

7 Cleaning an RNC Air FilterRNC



Air Filters In the N68-21-N Cabinet

Figure 7-2 shows the air filters in the N68-21-N cabinet.

Figure 7-2 Air filters in the N68-21-N cabinet

NOTE

The black air filter at the bottom of the cabinet is fixed on the rack by using screws. The other black filtersare fixed on the cabinet by using zig wires.

7.2 Cleaning the Air Filter at the RNC Cabinet Bottom(N68-22)

This part describes how to clean the air filter at the bottom of the RNC N68-22 cabinet. Themaintenance personnel should clean the air filter at the bottom of the cabinet regularly or at leastonce every quarter.



PrerequisiteThe tools for cleaning the air filter are ready. The tools are ESD wrist strap, cross screwdriver,and dry cleaning cloth.

Context


Procedure

Step 1 Open the front door of the cabinet. Then use a cross screwdriver to remove the two screws fromthe air filter, as shown in Figure 7-3.

Figure 7-3 Removing the air filter from the bottom of the N68-22 cabinet

Step 2 Hold the panel of the air filter with both hands and lift the air filter slightly to make the panelhigher than the screws that fix the grounding cables at the bottom of the cabinet. Then pull theair filter out of the cabinet at a slow pace.

Step 3 Clean the air filter with water and wipe the air filter with dry cloth. Then dry the air filter in aventilated place.




CAUTIONDo not insert a wet air filter into the cabinet. Otherwise, the RNC may be damaged by shortcircuits after the water is absorbed into the cabinet.

Step 4 Push the dry and clean air filter into the cabinet aslant and downwards along the guide rails.

Step 5 After the air filter is in place, use the cross screwdriver to fix the two screws on the air filterframe, as shown in Figure 7-4.

Figure 7-4 Installing the air filter at the bottom of the N68-22 cabinet

----End

7.3 Cleaning the Air Filter at the RNC Cabinet Bottom(N68-21-N)

This part describes how to clean the air filter at the bottom of the N68-21-N cabinet. Themaintenance personnel should clean the air filter at the bottom of the cabinet regularly or at leastonce every quarter.

PrerequisiteThe tools for cleaning the air filter are ready. The tools are ESD wrist strap, cross screwdriver,and dry cleaning cloth.



Context


Procedure

Step 1 Open the front door of the cabinet. Then use a cross screwdriver to remove the two screws fromthe air filter, as shown in Figure 7-5.

Figure 7-5 Pulling the air filter out of the bottom of the N68-21-N cabinet

Step 2 Hold the handle on the panel of the air filter and lift the air filter slowly until it is pulled out.

Step 3 Clean the air filter with water and wipe the air filter with dry cloth. Then dry the air filter in aventilated place.





Step 4 Insert with care the dry and clean air filter along the guide rails into the cabinet, as shown inFigure 7-6.

Figure 7-6 Installing the air filter at the bottom of the N68-21-N cabinet

Step 5 After the air filter is in position, use the cross screwdriver to fix the two screws on the air filterframe.

----End

7.4 Cleaning the Air Filters on the RNC Cabinet DoorsThis part describes how to clean the air filters on the inner sides of the two doors regularly,preferably once a quarter. The same procedures are performed when you clean the air filters onthe N68-22 cabinet doors and those on the N68-21-N cabinet doors.

Prerequisitel The tool for cleaning the air filter are ready. The tool is the ESD wrist strap.l The materials such as clean and dry cotton cloth are ready.

Context




Procedure

Step 1 Open the door of the cabinet and remove the zig wires and the black air filter from the inner sideof the door.

Step 2 Clean the air filter with water. Dry the air filter in a ventilated place or in a spin-drier.


Step 3 Wipe the metal surface of the inner side of the door by using dry and clean cotton cloth.

Step 4 Stick the clean and dry air filter to the inner side of the door.

CAUTIONIf the binding strips fail to work, replace it with new ones.

----End

7.5 Replacing an RNC Air FilterWhen an RNC air filter is worn out, replace the air filter. It takes about five minutes to replacethe air filter.

Prerequisitel The tools for replacing the air filter are ready. The tools are ESD wrist strap and cross

screwdriver.

l The spare air filters are ready.

Context


Procedure

Step 1 Remove the air filter in the cabinet.




If... Then...

The air filter is installed at the bottom ofthe cabinet.

Use the cross screwdriver to loosen the retentionscrew. Then remove the air filter.

The air filters are installed on the innersides of the front and back door.

Remove the air filter directly.

Step 2 Install the new air filter.

If... Then...

The air filter is installed at the bottom ofthe N68-22 cabinet.

Install the air filter to its original place. Then usethe cross screwdriver to fasten the screws.

The air filter is installed at the bottom ofthe N68-21-N cabinet.

Insert the air filter along the guide rails and usethe cross screwdriver to tighten the screws.

The air filters are installed on the innersides of the front and back door.

Stick the black air filters to the inner edges ofthe front and back doors. The air filters must betightly stuck to the black binding strips so thatthey do not fall off.

----End

PostrequisiteHandle the replaced air filters in a proper way without polluting the environment.



8 Replacing RNC Boards

About This Chapter

This part describes how to replace the boards in the RNC cabinet.

8.2 Procedures for Replacing an RNC BoardThis part describes the general procedure to replace a board in the RNC.

8.3 Replacing a WOPB BoardWhen a WOPB board is faulty, replace the WOPB board. The WOPB board is hot swappable.It takes about two minutes to replace the WOPB.

8.4 Replacing an MDMC BoardWhen an MDMC board is faulty, replace the MDMC board. The MDMC board is hot swappable.It takes about two minutes to replace the MDMC.

8.5 Replacing an AEUa BoardWhen an AEUa board is faulty, replace the AEUa board. The AEUa board is hot swappable. Ittakes about five minutes to replace the AEUa board.

8.6 Replacing an AOUa BoardWhen an AOUa board is faulty, replace the AOUa board. The AOUa board is hot swappable. Ittakes about five minutes to replace the board.

8.7 Replacing a CSUa BoardWhen a CSUa board is faulty, replace the CSUa board. The CSUa board is hot swappable. Ittakes about three minutes to replace the CSUa board.

8.8 Replacing a DPUb BoardWhen a DPUb board is faulty, replace the DPUb board. The DPUb board is hot swappable. Ittakes about two minutes to replace the board.

8.9 Replacing a PFCU BoardWhen a PFCU board is faulty, replace the PFCU board.

8.10 Replacing an FG2a BoardWhen an FG2a board is faulty, replace the FG2a board. The FG2a board is hot swappable. Ittakes about five minutes to replace the board.

8.11 Replacing a GCUa/GCGa Board

RNCSite Maintenance Guide 8 Replacing RNC Boards


When a GCUa/GCGa board is faulty, replace the GCUa/GCGa board. The GCUa/GCGa boardis hot swappable. It takes about five minutes to replace the board.

8.12 Replacing a GOUa BoardWhen a GOUa board is faulty, replace the GOUa board. The GOUa board is hot swappable. Ittakes about five minutes to replace the board.

8.13 Replacing an OMUa BoardWhen an OMUa board is faulty, replace the OMUa board. It takes about 16 minutes to replacean OMUa board.

8.14 Replacing a PEUa BoardWhen a PEUa board is faulty, replace the PEUa board. The PEUa board is hot swappable. Ittakes about five minutes to replace the board.

8.15 Replacing an SCUa BoardWhen an SCUa board is faulty, replace the SCUa board. The SCUa board is hot swappable. Ittakes about four minutes to replace the SCUa board.

8.16 Replacing an SPUa BoardWhen an SPUa board is faulty, replace the SPUa board. The SPUa board is hot swappable. Ittakes about six minutes to replace the SPUa board.

8.17 Replacing a UOIa BoardWhen a UOIa board is faulty, replace the UOIa board. The UOIa board is hot swappable. It takesabout five minutes to replace the board.

8.18 Replacing an RNC SubrackWhen an RNC subrack is faulty, replace the RNC subrack. It takes about 60 minutes to replacethe RNC subrack.

8.19 Replacing an RNC Power Distribution BoxWhen an RNC power distribution box is faulty, replace the power distribution box. It takes about25 minutes to replace a power distribution box.

8.20 Replacing an RNC Fan BoxWhen an RNC fan box is faulty, replace the fan box. The fan box should be replaced within oneminute.

8 Replacing RNC BoardsRNC



8.1 Safety Precautions of Board OperationThis part describes the precautions you must abide by when you install, remove, or replace theRNC boards, or perform any other operation that requires body contact with the boards.

Safety Precautions Before the Board Operationl Keep such packing materials as ESD boxes and bags in the equipment room for later use.

l Keep the boards and other electrostatic sensitive parts in ESD bags. Do not use non-antistatic materials such as white foams, common plastic bags, or paper bags to pack boards.Prevent these materials from contacting boards.

l Before inserting the boards into the subrack, ensure that the cabinet is properly grounded.Otherwise, the boards may be damaged.

Safety Precautions During the Board Operationl Place the board on an ESD pad when replacing board hardware or chips. Wear ESD wrist

strap and use a pair of ESD tweezers or an extraction tool to take or replace board chips.Do not touch board chips or pins with your bare hands.

l Wear an ESD wrist strap when you need to touch the ports on the boards. Discharge thestatic electricity of the cables and protective sleeves before connecting them to the ports.

l When installing the boards, do not touch the PCB or other components except the jumperand the DIP switches on the board.

l Place the removed boards or other components on an ESD pad or other ESD materials. Donot use non-antistatic materials such as white foams, common plastic bags, or paper bagsto pack boards. Prevent these materials from contacting boards.

8.2 Procedures for Replacing an RNC BoardThis part describes the general procedure to replace a board in the RNC.

8.2.1 Removing the RNC BoardThis part describes how to remove the boards from the subracks. All the boards in the RNCcabinets are hot swappable.

8.2.2 Inserting the RNC BoardThis part describes how to insert the RNC boards.

8.2.3 Checking and Setting DIP Switches on RNC SubracksThe DIP switches on subracks are used to set the subrack numbers. You need to check and setthe DIP switches before installing the RNC subracks.

8.2.1 Removing the RNC BoardThis part describes how to remove the boards from the subracks. All the boards in the RNCcabinets are hot swappable.



PrerequisiteThe tools required for removing the RNC boards are all ready. The tools are the ESD wrist strap,cross screwdriver, ESD box or bag, dustfree cotton cloth, and fiber cleaner.

Context

CAUTIONl Correctly put on the ESD wrist strap and ensure that the ESD wrist strap is properly connected

to the ESD connector on the cabinet.l When removing the boards, do not touch the PCB or any component except the jumper and

DIP switches.

For other rules you must obey when removing the RNC boards, refer to 8.1 Safety Precautionsof Board Operation .

Procedure

Step 1 Anticlockwise turn the captive screws on the board panel. Ensure that the captive screws arefully detached from the subrack, as shown in parts d and f in Figure 8-1.




Figure 8-1 Removing RNC boards

Step 2 Hold the two ejector levers and turn them outward by about 45°, as shown in part b in Figure8-1.

Step 3 Hold the two ejector levers and pull out the board along the guide rail, as shown in part c inFigure 8-1.

CAUTIONPull out the board steadily without shaking the board. The shaking may damage the pins on thebackplane and the board connector.

Step 4 With one hand pulling the upper ejector lever on the front panel and the other hand holding thebottom of the board, pull the board out of the subrack.

Step 5 Put the removed board in an ESD box or bag.

----End



8.2.2 Inserting the RNC BoardThis part describes how to insert the RNC boards.

Prerequisitel The tools required for inserting RNC boards are all ready. The tools are the ESD wrist strap,

cross screwdriver, and ESD box or bag.l The board to be installed is ready and the DIP switches are correctly set.

Context

CAUTIONl Correctly put on the ESD wrist strap and ensure that the ESD wrist strap is properly connected

to the ESD connector on the cabinet.l When inserting the boards, do not touch the PCB or other components except the jumper and

the DIP switches on the board.

For which slot a board can be inserted into, refer to Boards in the RSS Subrack and Boardsin the RBS Subrack.

For other rules you must obey when inserting the RNC boards, refer to 8.1 Safety Precautionsof Board Operation .

Procedure

Step 1 Take the board out of the ESD box and check the pins and ports on the board.If there is any pin distorted, broken, or missing, or any port distorted, contact Huawei engineers.

Step 2 As shown in parts e and f in Figure 8-2, push the fixers on the panel while pulling the ejectorlevers to detach them from the fixers. Hold the two ejector levers and turn them outward to thefull extent. After the turning, the ejector levers shall be in the position as shown in part b inFigure 8-2.

Step 3 With one hand holding the panel of the board and the other hand holding the board bottom, insertthe board into the subrack along the guide rails. Push the borad till the ejector levers hook on tothe guide rails. The ejector levers are half open.




Figure 8-2 Installing RNC boards

CAUTIONPush the boards slowly and steadily to avoid damaging the backplane pins and the boardconnector.

Step 4 As shown in part c in Figure 8-2, turn inward the two ejector levers together by 60°till the ejectorlevers hook on to the fixers on the panel. After the turning, the board is tightly installed on thebackplane the ejector levers hook on to the subrack, as shown in part d in Figure 8-2.

Step 5 Push the captive screws and tighten the screws clockwise to secure the board, as shown in partsg and h in Figure 8-2.



NOTE

The captive screws on the panel have springs. The captive screws can touch the holes and be tightenedonly when they are pushed.

----End

8.2.3 Checking and Setting DIP Switches on RNC SubracksThe DIP switches on subracks are used to set the subrack numbers. You need to check and setthe DIP switches before installing the RNC subracks.

Context

CAUTIONCorrectly put on the ESD wrist strap and ensure that the ESD wrist strap is properly connectedto the ESD connector on the cabinet.

The DIP switch on the RNC subrack consists of eight bits. If a bit is set to ON, it indicates 0. Ifa bit is set to OFF, it indicates 1. Table 8-1 describes the setting of the DIP switches on the RNCsubracks. Subrack 0 is the RSS subrack. Subracks 1–5 are RBS subracks.

Table 8-1 Settings of DIP switches on subracks

SubrackNo.

Bit

1 2 3 4 5 6 7 8

Subrack 0 ON ON ON ON ON ON ON OFF

Subrack 1 OFF ON ON ON ON OFF ON OFF

Subrack 2 ON OFF ON ON ON OFF ON OFF

Subrack 3 OFF OFF ON ON ON ON ON OFF

Subrack 4 ON ON OFF ON ON OFF ON OFF

Subrack 5 OFF ON OFF ON ON ON ON OFF

Procedure

Step 1 Loosen the screws which are located diagonally on the covers of the DIP switches by turningthe screws anticlockwise.

Step 2 Turn the covers around the lower right screws to open the covers.

Step 3 Set the DIP switches according to Table 8-1. For each DIP switch, set bits 1–5 first.

Step 4 Set bit 7 to ON and set bit 8 to OFF.




Step 5 If an even number of bits are set to OFF, set bit 6 to OFF. If an odd number of bits are set toOFF, set DIP switch 6 to ON.

Step 6 Fix the cover back and fasten the cover by the screws.

----End

8.3 Replacing a WOPB BoardWhen a WOPB board is faulty, replace the WOPB board. The WOPB board is hot swappable.It takes about two minutes to replace the WOPB.

Prerequisitel The tools for replacing the alarm box signal cable are ready. The tools are ESD wrist strap,

cross screwdriver, and ESD box or bag.l The new WOPB is ready and meets field requirements.

l The LMT is started and the LMT properly communicates with the BAM.

Context

CAUTIONElectronic devices are easily damaged by Electrostatic Discharge (ESD). Correctly put on anESD wrist strap and touch only the edges of the boards especially when dealing with thecomponents such as boards.

Procedure

Step 1 Use the cross screwdriver to loosen the retention screws on the WOPB, as shown in Figure8-3.



Figure 8-3 Replacing the WOPB board

1 WOPB board 2 Handle 3 Captive screw

Step 2 Hold the handle on the WOPB and pull the WOPB out of the power distribution box. Then putthe WOPB into an ESD box or bag.

Step 3 Insert the new WOPB into the power distribution box along the guide rails.

Step 4 Fasten the captives screws on the WOPB.

Step 5 On the LMT, check whether there are any alarms that are caused by board failures.If the alarms are reported, locate and handle the faults according to the alarm help information.

----End

Postrequisite

Record the name and the PCB version of the replaced board. Check whether there are obviousphysical damages, such as the distorted pin, broken pin, or burnt board. If there is any damage,record the fault type and pack the replaced board. When packing a board, pay attention to thefollowing items:

l Put on an ESD wrist strap or a pair of ESD gloves.

l Ensure that each ESD bag or case holds only one board.

l When packing multiple small boards, isolate them with ESD materials.

Then contact the Huawei local office to handle the replaced board.




8.4 Replacing an MDMC BoardWhen an MDMC board is faulty, replace the MDMC board. The MDMC board is hot swappable.It takes about two minutes to replace the MDMC.


cross screwdriver, and ESD box or bag.l The new MDMC is ready and meets field requirements.


Context


Procedure

Step 1 Record the state of sound deadening switch on the MDMC to be replaced.For the location of sound deadening switch, refer to Panel of the MDMC Board.

Step 2 Set all the bits of DIP switch S2 on the new MDMC to ON, as shown in Figure 8-4.

Figure 8-4 Setting DIP switch S2 on the MDMC

Step 3 Use the cross screwdriver to remove the captive screws that fix the faulty MDMC, as shown inFigure 8-5.



Figure 8-5 Replacing the MDMC Board

1 MDMC board 2 Handle 3 Captive screw

Step 4 Hold the handle on the MDMC and pull the MDMC out of the power distribution box. Then putthe MDMC into an ESD box or bag.

Step 5 Insert the new MDMC into the power distribution box along the guide rails.

Step 6 Fasten the captive screws on the WDMC.

Step 7 Set the sound deadening sound switch on the new MDMC according to the recorded settings.

Step 8 The new board automatically loads the data configuration file and the RUN LED blinks (0.25sON, 0.25s OFF).For details about the status of the LED on the board, refer to LEDs on the MDMC Board.

NOTEWhen the RUN LED blinks every 0.25 second (0.25 s ON and 0.25 s OFF) or when the ALM LED is ON,pull out the MDMC and install it again to ensure that the MDMC is in full contact with the backplane.

Step 9 View the RUN LED on the board to verify that the board works properly. The RUN LED shouldblink every 1 second (1 s ON and 1 s OFF).

Step 10 On the LMT, check whether there are any alarms that are caused by board failures.If the alarms are reported, locate and handle the faults according to the alarm help information.

----End

PostrequisiteRecord the name and the PCB version of the replaced board. Check whether there are obviousphysical damages, such as the distorted pin, broken pin, or burnt board. If there is any damage,record the fault type and pack the replaced board. When packing a board, pay attention to thefollowing items:l Put on an ESD wrist strap or a pair of ESD gloves.







8.5 Replacing an AEUa BoardWhen an AEUa board is faulty, replace the AEUa board. The AEUa board is hot swappable. Ittakes about five minutes to replace the AEUa board.

Prerequisitel The tools for replacing the UOIa board are ready. The tools are ESD wrist strap, cross

screwdriver, and ESD box or bag.

l The new AEUa board is ready.


Context


CAUTIONl The replacement of the standby AEUa has no negative effect on the system. When you replace

an independent AEUa, the services carried on this board are interrupted.

l When the RNC and its peer equipment are connected by using only the AEUa, all the servicesbetween the RNC and its peer equipment are interrupted when you replace the AEUa.

Procedure

Step 1 Run the LST SUBRACK command on the LMT to query the board redundancy status.

If... Then...

Backup type is Board and port backup binding. Go to Step 2.

Backup type is No Backup. Go to Step 3.



NOTE

If one type of RNC boards work in active/standby mode, they must be installed in two neighboring slots:one is an even numbered slot and the other is an odd numbered slot (even nubmer plus 1). For example, ifthe boards in slots 14 and 15 do not work in active/standby mode, they work independently.

Step 2 Run the DSP BRD command on the LMT to query the board status.

If... Then...

CPU status is Normal. 1. Run the SWP BRD command to switch the board from active tostandby.

2. Go to Step 3.NOTE

The forcible switchover of the boards may affect the operation of the RNC.Therefore, use this command only when the traffic is low, for example, atmidnight.

Others Go to Step 3.

Step 3 Check whether the labels on the trunk cable and clock cable to the AEUa are legible. If the labelsare illegible, relabel the cables to avoid faulty connections after the board is replaced.

Step 4 Disconnect the clock cable. Use the straight screwdriver to loosen the captive screws on thetrunk cable connector. Then disconnect the trunk cable.

Step 5 Remove the AEUa board, as described in 8.2.1 Removing the RNC Board.

Step 6 Check whether the settings of the DIP switches on the new board are correct by referring to 12.2DIP Switches on the AEUa Board.

If... Then...

The settings are correct. Go to Step 7.

The settings are incorrect. 1. Reset the DIP switches.2. Go to Step 7.

Step 7 Install the new board in the subrack, as described in 8.2.2 Inserting the RNC Board.The new board automatically loads the data configuration file and the RUN LED blinks every0.125 s (0.125 s ON and 0.125 s OFF).

Step 8 Connect the trunk cable and clock cable by referring to the labels.

Step 9 If the RUN LED blinks every 1 s (1 s ON and 1 s OFF), run the DSP BRD command to querythe status of the new board.

If... Then...

CPU status is Normal or Standby normal Go to Step 11.





Step 10 On the LMT, check whether there are any alarms that are caused by board faults.

If... Then...

The alarms that are caused by boardfaults are reported.

1. Locate and handle the faults according to thealarm help information.

2. Go to Step 9.

No such alarms are reported. Go to Step 11.

Step 11 Run the DSP BRDVER command to query the software version of the new board and checkwhether the version is consistent with that in the Matching Between Board Hardware andSoftware part of the version matching document.

If... Then...

The version is consistent with that in theMatching Between Board Hardware andSoftware part.

Go to Step 12.

The versions are inconsistent. 1. Ensure that the program files of the boardin the directory \BAM\LoadData on theBAM are correct. If the files are incorrect,contact Huawei engineers for correct ones.

2. Run the RST BRD command to reset theboard.

3. Go to Step 9.

NOTE

You can obtain the correct Matching Between Board Hardware and Software from the version matchingdocument.

Step 12 Test CS services (dialing) and PS services (browsing web pages) to ensure that the board isfunctional.

----End

Postrequisite








8.6 Replacing an AOUa BoardWhen an AOUa board is faulty, replace the AOUa board. The AOUa board is hot swappable. Ittakes about five minutes to replace the board.


screwdriver, straight screwdriver, ESD box or bag, dustfree cotton cloth, and fiber cleaner.l The new AOUa board is ready.


Context


CAUTIONl The replacement of the standby AOUa has no negative effect on the RNC. When you replace

an independent AOUa, all the services carried on the board are interrupted.l When the RNC and its peer equipment are connected by using only the AOUa, all the services

between the RNC and its peer equipment are interrupted when you replace the AOUa.

Procedure

Step 1 Run the LST SUBRACK commond on the LMT to query the board redundancy status.

If... Then...



NOTE






If... Then...





Step 3 Run the DSP OPT command on the LMT to query the status of the optical ports on the UOIaboard to be replaced.

If... Then...

The optical port on the UOIa works instandby state.

Go to Step 4.

The optical port on the UOIa works inactive state.

1. Run the SET MSPCMD command to switchthe port from active to standby. Set MSPControl Command to MS(Manualswitchover from working link to protectionlink).

2. Go to Step 4.

Step 4 Check whether the labels on the optical cable and clock cable (if configured) to the AOUa arelegible. If the labels are illegible, relabel the cables to avoid faulty connections after the boardis replaced.

Step 5 Remove the clock cable.

Step 6 Remove the optical cable and cap the connectors to prevent dust. If any connector is dirty, cleanit by using the dustfree cotton cloth or fiber cleaner.

Step 7 Remove the board, as described in 8.2.1 Removing the RNC Board. Then cap the optical portsto prevent dust.

Step 8 Check whether the settings of the DIP switches on the new board are correct by referring to 12.3DIP Switches on the AOUa Board.

If... Then...





Step 9 Install the new board into the subrack, as described in 8.2.2 Inserting the RNC Board.The new board automatically loads the data configuration file and the RUN LED blinks every0.125 s (0.125 s ON and 0.125 s OFF).

Step 10 Remove the caps from the optical ports and connectors and keep them for later use. Then installthe optical cable by referring to the labels.

Step 11 Install the clock cable (if required) by referring to the labels.


If... Then...




If... Then...



2. Go to Step 12.



If... Then...


Go to Step 15.



3. Go to Step 12.

NOTE






----End





8.7 Replacing a CSUa BoardWhen a CSUa board is faulty, replace the CSUa board. The CSUa board is hot swappable. Ittakes about three minutes to replace the CSUa board.


screwdriver, and ESD box or bag.l The new CSUa board is ready.


Context


CAUTIONl Replacing the standby CSUa has no negative effect on the system. When you replace an

independent CSUa, the services carried on this board are interrupted.

Procedure

Step 1 Start the LMT. Open the RSS subrack on the Device Panel tab page. Check the configurationof the CSUa.



If... Then...

Slots 0 and 1 are configured with the CSUa boards. Go to Step 2.

Slot 0 or 1 is configured with the CSUa. Go to Step 3.

Step 2 Run the DSP BRD command on the LMT to query the status of the board to be replaced.

If... Then...





Step 3 Remove the board, as described in 8.2.1 Removing the RNC Board.



If... Then...

Only one CSUa is configured and CPU status is Normal. Go to Step 7.

Two CSUa boards are configured and CPU status is Standby normal. Go to Step 7.



If... Then...



2. Go to Step 5.






If... Then...


Go to Step 8.

The versions are inconsistent. 1. Ensure that the program files of the boardin the BAM active workspace directory/LoadData on the BAM are correct.If thefiles are incorrect, contact Huaweiengineers for correct ones.


3. Go to Step 5.

NOTE


Step 8 The CSUa board verifies MBMS services. the board is functional.

----End

Postrequisite

Record the name and the PCB version of the replaced board. Check whether there are obviousphysical damages, such as the distorted pin, broken pin, or burnt board. If there is any damage,record the fault type and pack the replaced board. When packing a board, pay attention to thefollowing items:l Put on an ESD wrist strap or a pair of ESD gloves.




8.8 Replacing a DPUb BoardWhen a DPUb board is faulty, replace the DPUb board. The DPUb board is hot swappable. Ittakes about two minutes to replace the board.


screwdriver, and ESD box or bag.l The new DPUb board is ready.




Context


CAUTIONThe replacement of the DPUb board may interrupt all the services carried on the board.

Procedure

Step 1 Run the LST SUBRACK command on the LMT to query the board status.

If... Then...

The value of the Logical Inhibited boardor Physical Inhibited board contains thatof the DPUb board.

Go to Step 2.

The value of the Logical Inhibited boardor Physical Inhibited board contains thatof the DPUb board.

1. Run the INH BRD command to block theboard.


Blocking the DPUb can prevent new UEs fromaccessing the system and minimize the influence onRNC services.

Step 2 Remove the DPUb board, as described in 8.2.1 Removing the RNC Board.


Step 4 Run the INH BRD command to block the board.

Step 5 Run the DSP BRD command to query the status of the new board




If... Then...

CPU status is Normal. Go to Step 7.

CPU status is not Normal. Go to Step 6.


If... Then...



2. Go to Step 5.



If... Then...


Go to Step 8.

The versions are inconsistent. 1. Ensure that the program files of the board inthe BAM active workspace directory/LoadData on the BAM are correct. If thefiles are incorrect, contact Huaweiengineers for correct ones.


3. Go to Step 5.

NOTE


Step 8 Test CS services (dialing) and PS services (browsing web pages). the board is functional.

----End

PostrequisiteRecord the name and the PCB version of the replaced board. Check whether there are obviousphysical damages, such as the distorted pin, broken pin, or burnt board. If there is any damage,record the fault type and pack the replaced board. When packing a board, pay attention to thefollowing items:







8.9 Replacing a PFCU BoardWhen a PFCU board is faulty, replace the PFCU board.

ProcedureWhen the PFCU is faulty, replace the entire fan box. For details, refer to 8.20 Replacing anRNC Fan Box.

----End

8.10 Replacing an FG2a BoardWhen an FG2a board is faulty, replace the FG2a board. The FG2a board is hot swappable. Ittakes about five minutes to replace the board.


screwdriver, straight screwdriver, and ESD box or bag.l The new FG2a board is ready.

l The LMT is started and the connection between the LMT and the BAM is operational.

Context





CAUTIONl If the backup type of the FG2a is "Board and port backup binding" or "Board and port backup

apart", the replacement of the FG2a does not affect the RNC.

l When the FG2a works in "Board backup; port not backup" mode, replacing the FG2ainterrupts part of services if the port works in load sharing mode and the total traffic volumeof the port exceeds the port bandwidth of the active board; if the port works independently,replacing the FG2a interrupts all the services carried on the port.

l The replacement of an independent FG2a interrupts all the services on the board.

l When the RNC and its peer equipment are connected only through the FG2a, servicesbetween the RNC and its peer equipment are interrupted when you replace the FG2a.

Procedure


If... Then...

Backup type is Board and port backupbinding or Board and port backup apart.

Go to Step 2.

Backup type is Board and port backupbinding.

Go to Step 2. Then go to Step 4.


NOTE

Only the board that is housed in a slot with an even number and the board that is housed in a slot with theeven number plus 1 can form a redundancy relationship. For example, if the board that is housed in slot 14does not work in backup mode, the board that is housed in slot 15 either.


If... Then...



Changing the working mode of the board may affect the running of thesystem. Therefore, use this command when the traffic is low, for instance,in the midnight.




NOTE

When the FG2a works in "Board backup; port not backup" mode, all the ports on the active and standbyFG2a boards work in active state. It is not necessary to switch over ports. Go to Step 4.

Step 3 Run the DSP ETHPORT command on the LMT to query the status of the ports on the FG2aboard to be replaced.

If... Then...

Standby Go to Step 4.

The port on the GOUa board works inactive mode.

1. Run the SWP ETHPORT command to switchthe port from active to standby.

2. Go to Step 4.

Step 4 Check whether the labels on the Ethernet cable connected to the FG2a are legible. If the labelsare illegible, relabel the Ethernet cable to avoid a faulty connection after replacing the board.

Step 5 Disconnect the Ethernet cable from the faulty board.


Step 7 Install the new board into the subrack, as described in 8.2.2 Inserting the RNC Board.

The new board automatically loads the data configuration file and the RUN LED blinks every0.125 s (0.125 s ON and 0.125 s OFF).

Step 8 Install the Ethernet cable by referring to the labels.


If... Then...




If... Then...


1. Locate and handle the problem according tothe alarm help information.

2. Go to Step 9.






If... Then...


Go to Step 12.

The versions are inconsistent. 1. Ensure that the program files of the board inthe directory BAM active workspacedirectory/LoadData on the BAM arecorrect. If the files are incorrect, contactHuawei engineers for correct ones.


3. Go to Step 9.

NOTE



----End

Postrequisite






8.11 Replacing a GCUa/GCGa BoardWhen a GCUa/GCGa board is faulty, replace the GCUa/GCGa board. The GCUa/GCGa boardis hot swappable. It takes about five minutes to replace the board.


screwdriver, straight screwdriver, and ESD box or bag.

l The new GCUa/GCGa board is ready.

l The LMT is started and the connection between the LMT and the BAM is operational.



Context


CAUTIONThe replacement of the standby GCUa/GCGa does not affect the RNC. The replacement of anindependent GCGa interrupts all the services on the board.

Procedure

Step 1 Start the LMT. Open the RSS subrack on the Device Panel tab page. Check the configurationof the GCUa/GCGa.

If... Then...

Slots 12 and 13 are configured with the GCUa/GCGa boards. Go to Step 2.

Slot 12 or 13 is configured with the GCUa/GCGa. Go to Step 3.

Step 2 On the LMT, run the DSP BRD command to query the status of the board.

If... Then...

CPU status is Normal . 1. Run the SWP BRD command to switch the board from activeto standby.


Changing the working mode of the board may affect the running of thesystem. Therefore, use this command when the traffic is low, for instance,in the midnight.


Step 3 Check whether the labels on cables connected to the GCUa/GCGa are legible. If the labels areillegible, relabel the cables to avoid faulty connections after replacing the board.

Step 4 Disconnect all the cables from the faulty board.







Step 7 Install the cables by referring to the labels.


If... Then...

Only one GCUa/GCGa is configured and CPU status is Normal. Go to Step 10.

Two GCUa boards/GCGas are configured and CPU status is Standbynormal.

Go to Step 10.



If... Then...


1. Locate and handle the problem according tothe alarm help information.

2. Go to Step 8.



If... Then...


Go to Step 11.



3. Go to Step 8.

NOTE





----End





8.12 Replacing a GOUa BoardWhen a GOUa board is faulty, replace the GOUa board. The GOUa board is hot swappable. Ittakes about five minutes to replace the board.


screwdriver, straight screwdriver, ESD box or bag, dustfree cotton cloth, and fiber cleaner.l The new GOUa board is ready.


Context





CAUTIONl If the backup type of the GOUa is "Board and port backup binding" or "Board and port backup

apart", the replacement of the GOUa does not affect the RNC.l When the GOUa works in "Board backup; port not backup" mode, the replacement of the

GOUa interrupts some data and services if the ports work in load sharing mode and the totaltraffic volume exceeds the port bandwidth of the active board. If the ports workindependently, the replacement interrupts all the services carried on the ports.

l The replacement of an independent GOUa interrupts all the services on the board.

l When the RNC and its peer equipment are connected by using only the GOUa, all the servicesbetween the RNC and its peer equipment are interrupted after the GOUa is replaced.

ProcedureStep 1 Run the LST SUBRACK command on the LMT to query the board status.

If... Then...

Backup type is Board and port backupbinding or Board and port backup apart.

Go to Step 2.

Backup type is Board and port backupbinding.

Go to Step 2. Then go to Step 4.


NOTE



If... Then...




Other Go to Step 3.

Step 3 Run the DSP ETHPORT command on the LMT to query the status of the ports on the GOUaboard to be replaced.



If... Then...

The port on the GOUa board works instandby mode.

Go to Step 4.

The port on the GOUa board works inactive mode.

1. Run the SWP ETHPORT command to switchthe port from active to standby.

2. Go to Step 4.

NOTE

When the GOUa works in "Board backup; port not backup" mode, all the ports on the active and standbyGOUa boards work in active state. It is not necessary to switch over ports. Go to Step 4.

Step 4 Check whether the labels on the optical cables to the GOUa are legible. If the labels are illegible,relabel the optical cables to avoid faulty connections after the board is replaced.


Step 6 Remove the board, as described in 8.2.1 Removing the RNC Board. Then cap the optical portsto prevent dust.

Step 7 Install the new board into the subrack, as described in 8.2.2 Inserting the RNC Board.The new board automatically loads the data configuration file and theRUN LED blinks every 0.125 s (0.125 s ON and 0.125 s OFF).

Step 8 Remove the caps from the optical ports and connectors and keep them for later use. Then installthe optical cable by referring to the labels.


If... Then...


Other Go to Step 10.


If... Then...



2. Go to Step 9.






If... Then...


Go to Step 12.

The versions are inconsistent. 1. Ensure that the program files of the board inthe BAM active workspace installationdirectory\LoadData on the BAM arecorrect.If the files are incorrect, contactHuawei engineers for correct ones.


3. Go to Step 9.

NOTE



----End

Postrequisite






8.13 Replacing an OMUa BoardWhen an OMUa board is faulty, replace the OMUa board. It takes about 16 minutes to replacean OMUa board.


cross screwdriver, and ESD box or bag.

l The LMT is started and the LMT properly communicates with the BAM. If the OMUa isfaulty and fails to communicates with the LMT, the version of the LMT application mustbe consistent with the software version of the standby OMUa.



l The standby OMUa is installed and configured with all necessary software. Whenconfiguring the new OMUa board, ensure that the following items are consistent with thoseof the OMUa board to be replaced:– Operating system administrator password

– SQL Server password

– FTP server password

– System administtrator (admin for short) password

– The virtual internal and external IP address of OMUa board

Context


CAUTIONl When only one OMUa board is configured, the replacement interrupts the communication

between BAM and FAM. The active data of the RNC is lost.l When two OMUa boards that work in active/standby mode are configured, the replacement

of the standby OMUa does not affect the RNC.

Procedure

Step 1 If two OMUa boards are configured, ensure that the OMUa to be replaced is not active.

If... Then...

The OMUa to be replaced is faulty. Replace the faulty OMUa only after the board isautomatically switched to standby mode or stopsrunning.

The OMUa is replaced for other reasons. Run the DSP BRD command to query the statusof the new board.l If the OMUa to be replaced is active, run the

SWP BAM command on the LMT for aforcible switchover. Then run the DSP BAMcommand five minutes later to ensure that theboard is in standby state.

l If the OMUa to be replaced is standby, replacethe OMUa with a new one.




CAUTIONIf part of the processes on the active OMUa malfunction after an emergency switchover, youmay infer that the data between both OMUa boards is not synchronized before the switchover.Use either of the following methods for troubleshooting:

l If the previously active OMUa can work properly, stop the active OMUa and switch overthe other OMUa from standby to active. Then start the new standby OMUa. Run the SWPBAM command on the LMT to perform a forcible switchover after the data between theactive OMUa and the standby OMUa is synchronized.

l Restore the data manually on the malfunctional active OMUa. For details, refer to RestoringRNC System Data.

Step 2 Turn outwards the ejector levers of the OMUa, as shown in part (1) of Figure 8-6.

Figure 8-6 Removing the OMUa board

NOTE

After you turn the ejector levers, the board automatically shuts down the operating system and hard disks.The OFFLINE LED on the board is ON steadily, which indicates that the board is powered off. These tasksare automatically completed by the OMUa board.

Step 3 Remove the Ethernet cable, mouse cable, keyboard cable, and monitor cable (if configured) fromthe OMUa.

Step 4 Loosen the screws on the OMUa, as shown in part (2) of Figure 8-6.

Step 5 Pull out the board along the guide rails, as shown in part (3) of Figure 8-6.

Step 6 Push the new board into the subrack along the guide rails, as shown in part (4) of Figure 8-7.



Figure 8-7 Installing the OMUa board

Step 7 Turn inwards the ejector levers of the OMUa until they are in position, as shown in part (2) ofFigure 8-7.

Step 8 Secure the captive screws on the OMUa, as shown in part (3) of Figure 8-7.The new board automatically loads the data configuration file and the RUN LED blinks every0.125 s (0.125 s ON and 0.125 s OFF).



If... Then...

Only one SCUa is configured and CPU status is Active normal. Go to Step 12.

Two SCUa boards are configured and CPU status is Standbynormal.

Go to Step 12.



If... Then...



2. Go to Step 10.




If... Then...


Step 12 Run the DSP BAMMODULE command to query the status of the BAM.

If... Then...

Status is Started. The replacement is complete.

Status is Stopped. Restart the abnormal processes. If the problem persists, contact thelocal Huawei office for technical support.

Status is Abnormal. Contact the local Huawei office for technical support.

----End

PostrequisiteRecord the name and the PCB version of the replaced board. Check whether there are obviousphysical damages, such as the distorted pin, broken pin, or burnt board. If there is any damage,record the fault type and pack the replaced board. When packing a board, pay attention to thefollowing items:l Put on an ESD wrist strap or a pair of ESD gloves.l Ensure that each ESD bag or case holds only one board.l When packing multiple small boards, isolate them with ESD materials.Then contact the Huawei local office to handle the replaced board.

8.14 Replacing a PEUa BoardWhen a PEUa board is faulty, replace the PEUa board. The PEUa board is hot swappable. Ittakes about five minutes to replace the board.


screwdriver, straight screwdriver, and ESD box or bag.l The new PEUa board is ready.

Context




CAUTIONl The replacement of the standby PEUa has no negative effect on the RNC. When you replace

an independent PEUa, the services carried on the board are interrupted.

l When the RNC and its peer equipment are connected by using only the PEUa, all the servicesbetween them are interrupted during the replacement.

Procedure


If... Then...



NOTE



If... Then...





Step 3 Check whether the labels on the trunk cable and clock cable (if configured) to the PEUa arelegible. If the labels are illegible, relabel the cables to avoid faulty connections after the boardis replaced.

Step 4 Disconnect the clock cable. Use the straight screwdriver to loosen the captive screws on thetrunk cable connector. Then disconnect the trunk cable.


Step 6 Check whether the settings of the DIP switches on the new board are correct by referring to 12.4DIP Switches on the PEUa Board.




If... Then...




Step 8 Connect the trunk cable and clock cable by referring to the labels.


If... Then...




If... Then...



2. Go to Step 9.



If... Then...


Go to Step 12.



If... Then...



3. Go to Step 9.

NOTE



----End





8.15 Replacing an SCUa BoardWhen an SCUa board is faulty, replace the SCUa board. The SCUa board is hot swappable. Ittakes about four minutes to replace the SCUa board.


screwdriver, ESD box or bag, dustfree cotton cloth, and fiber cleaner.l The new SCUa board is ready.





Context


CAUTIONl The replacement of the standby SCUa board reduces the switching capacity in the RNC and

affects the services to some degree.

l When no standby SCUa is configured, all the other boards in the RBS are reset and all theservices carried on the RBS are interrupted if you replace the only SCUa.

l When no standby SCUa is configured, all the other boards in the RSS are reset and all theservices carried on the RSS are interrupted if you replace the only SCUa. In addition, thecommunication between the RSS and the RBSs and inter-RBS communication fail.

Procedure

Step 1 Start the LMT. On the Device Panel tab page, view the subrack that hosts the SCUa to bereplaced. Check the configuration of the SCUa.

If... Then...

Slots 6 and 7 are configured with the SCUa boards. Go to Step 2.

Slot 6 or 7 is configured with the SCUa. Go to Step 3.

Step 2 Run the DSP BRD command on the LMT to query the status of the board to be replaced.

If... Then...







Step 3 Check whether the labels on the cables to the SCUa are legible. If the labels are illegible, relabelthe cables to avoid faulty connections after the board is replaced.

Step 4 Disconnect the cables from the faulty board.





If... Then...

Only one CSUa is configured and CPU status is normal. Go to Step 10.

Two SCUa boards are configured and CPU status is Standbynormal.

Go to Step 10.



If... Then...



2. Go to Step 8.



If... Then...


Go to Step 11.




If... Then...



3. Go to Step 8.

NOTE



----End





8.16 Replacing an SPUa BoardWhen an SPUa board is faulty, replace the SPUa board. The SPUa board is hot swappable. Ittakes about six minutes to replace the SPUa board.


screwdriver, ESD box or bag, dustfree cotton cloth, and fiber cleaner.l The new SPUa board is ready.




Context


CAUTIONThe replacement of the standby SPUa has no negative effect on the RNC. When no standbySPUa is configured, the two SPUa boards in the same SPM are reset if you replace the onlySPUa.

Procedure

Step 1 Start the LMT. Open the subrack that hosts the SPUa on the Device Panel tab page. Check theconfiguration of the SPUa.

If... Then...

Two SPUa boards are configured in the same SPM. Go to Step 2.

Only one SPUa is configured in an SPM. Go to Step 3.


If... Then...












If... Then...

Only one SPUa is configured in an SPM and CPU status is Normal. Go to Step 7.

Two SPUa boards are configured in an SPM and CPU status is Normal. Go to Step 7.



If... Then...



2. Go to Step 5.



If... Then...


Go to Step 8.



3. Go to Step 5.

NOTE



----End



Postrequisite






8.17 Replacing a UOIa BoardWhen a UOIa board is faulty, replace the UOIa board. The UOIa board is hot swappable. It takesabout five minutes to replace the board.


screwdriver, ESD box or bag, dustfree cotton cloth, and fiber cleaner.

l The new UOIa board is ready.


Context


CAUTIONl The replacement of the standby UOIa has no negative effect on RNC. When you replace an

independent UOIa, all the services carried on the board are interrupted.

l If the RNC and its peer equipment are connected by using only the UOIa, all the servicesbetween the RNC and its peer equipment are interrupted when you replace the UOIa.

Procedure





If... Then...



NOTE



If... Then...





Step 3 Run the DSP OPT command on the LMT to query the status of the optical ports on the UOIaboard to be replaced.

If... Then...

The optical port on the UOIa works instandby state.

Go to Step 4.

The optical port on the UOIa works inactive state.

1. Run the SET MSPCMD command to switchthe port from active to standby. Set MSPControl Command to MS(Manualswitchover from working link to protectionlink).

2. Go to Step 4.

Step 4 Check whether the labels on the optical cable and clock cable (if configured) to the AOUa arelegible. If the labels are illegible, relabel the cables to avoid faulty connections after the boardis replaced.

Step 5 Remove the clock cable.


Step 7 Remove the board, as described in 8.2.1 Removing the RNC Board. Then cap the optical ports.




Step 9 Remove the caps from the optical ports and connectors and keep them for later use. Then connectthe optical cable by referring to the labels.

Step 10 Install the clock cable (if required) by referring to the labels.


If... Then...




If... Then...



2. Go to Step 11.



If... Then...


Go to Step 14.



3. Go to Step 11.

NOTE






----End

Postrequisite






8.18 Replacing an RNC SubrackWhen an RNC subrack is faulty, replace the RNC subrack. It takes about 60 minutes to replacethe RNC subrack.


cross screwdriver, straight screwdriver, diagonal pliers, dustfree cotton cloth, and fibercleaner.

l The new subrack is ready.

Context


CAUTIONl The replacement of the RSS interrupts all the services carried on the RNC.

l The replacement of the RBS interrupts all the services carried on this subrack.

l Replace a subrack only when the traffic is low, for example, at midnight.

l It is the best for at least three persons to replace the heavy subrack.



Procedure

Step 1 Set the DIP switches on the new subrack according to the recorded settings.

Step 2 Check whether the labels on the cables are legible. If the labels are illegible, relabel the cablesto avoid faulty connections after the subrack is replaced.

Step 3 Record the installation positions of the boards in the subrack.

Step 4 Check the type of the subrack to be replaced as follows:

If the subrack is... Then...

RBS Turn off the power distribution switch of the subrack to be replaced.

RSS 1. Turn outwards the ejector levers on the OMUa, as shown in part (1)of Removing the OMUa board. Repeat this step if there are twoOMUa boards.

2. After the OFFLINE LED on the OMUa is ON steadily, turn off thepower distribution switch of the subrack to be replaced.

NOTE

For the function of each switch, refer to the label on the front panel of the power distribution box, as shownin 5.2 Layout of Power Switches on the RNC Cabinet.

Step 5 Remove the cables connected to the subrack. For details, refer to the 9 Replacing RNCCables.

Step 6 Pull the boards out of the subrack, as shown in 8.2.1 Removing the RNC Board. Then put themin the ESD boxes or bags.

Step 7 Remove the eight captive screws that fix the subrack on the cabinet at the front of the cabinet.

Step 8 One person pushes the subrack along the guide rails from the back of the cabinet. The other twopersons hold the mounting ears on the subrack and pull the subrack out of the cabinet.

Step 9 The two persons hold the mounting ears and the bottom of the new subrack at the front of thecabinet. Then push the subrack into the cabinet along the guide rails and fasten the captive screwsto fix the subrack to the cabinet.

Step 10 Install the power cable, grounding cable, and PGND cable of the new subrack.

Step 11 Turn on the switch that controls the subrack on the power distribution box.

Step 12 Mount the boards into the subrack by referring to the records in Step 3 and 8.2.2 Inserting theRNC Board.

NOTE

If the RSS is replaced, insert the OMUa first for power-on and data loading.

Step 13 Connect cables to the subrack. For details, refer to 9 Replacing RNC Cables.

Step 14 Commission the loaded data and services.For detailed procedures, refer to the RNC Commissioning Guide.




Step 15 Check whether there are alarms that are caused by subrack faults, for example, the Cell SetupFailed alarm. If such alarms are reported, handle the faults by referring to the alarm helpinformation. If the alarms persist, contact the local Huawei office for technical support.

----End

PostrequisiteContact the local Huawei office to handle the replaced subrack.

8.19 Replacing an RNC Power Distribution BoxWhen an RNC power distribution box is faulty, replace the power distribution box. It takes about25 minutes to replace a power distribution box.


cross screwdriver, and straight screwdriver.l The new power distribution box is ready and meets field requirements.

Context


CAUTIONl The replacement of the lower power distribution box in the RSR cabinet cuts off the power

to the RSS subrack and interrupts all the services carried on the RNC.l If another power distribution box is replaced, the power to the related RBS subrack is cut off

and all the services carried on the subrack are interrupted.

Figure 8-8 shows the ports on the back panel of the power distribution box.



Figure 8-8 Back panel of the power distribution box

1 Terminal block (for power input) 2 Terminal block (for power output) 3 Port for the signal monitoring cable4 Serial port

Procedure

Step 1 Check the type of the subrack that is controlled by the power distribution box to be replaced.

If the subrack is... Then...

RBS Go to Step 2.

RSS 1. Turn outwards the ejector levers on the OMUa, as shown in part (1)of Removing the OMUa board. Repeat this step if there are twoOMUa boards.

2. After the OFFLINE LED on the OMUa is ON steadily, go to Step2.

Step 2 Record the states of switches SW1 to SW6 on the power distribution box. Set the ones in ONstate to OFF.

Step 3 Set the switch on the PDF to OFF to cut off the power to the power distribution box.

Step 4 Remove the cables from the power distribution box. Figure 8-8 shows the cable connections tothe back panel of the power distribution box.1. Check the engineering labels on the power input cables that connect to the ports, as shown

in part 1 of Figure 8-8. If the labels are illegible, attach temporary labels and record theconnections of the cables. Then remove the cables.

2. Check the engineering labels on the power output cables that connect to the ports, as shownin part 2 of Figure 8-8. If the labels are illegible, attach temporary labels and record theconnections of the cables. Then remove the cables.

3. Remove the signal monitoring cable that connects to the port, as shown in part 3 of Figure8-8.




4. Remove the PGND cable that connects to the busbar of the cabinet from the box, as shownin Figure 8-8.

Step 5 Remove the captive screws that fix the faulty box at the front of the cabinet.

Step 6 Hold the handle on the box and take the box out of the cabinet.

Step 7 Mount the new box into the cabinet.

Step 8 Fasten the captive screws to fix the box.

Step 9 Connect cables to the box.1. Connect the power input cables by referring to the engineering labels or temporary labels.

Then, attach a new engineering label to each of these cables.2. Connect the output cables by referring to the engineering labels or temporary labels. Then,

attach a new engineering label to each of these cables.3. Connect the signal monitoring cable to the box.4. Connect the PGND cable to the box.

Step 10 Ensure that all the power cables are correctly connected.

Step 11 Set the switch on the PDF to ON to supply power to the power distribution box.

Step 12 Set the switches on the power distribution box to ON, as recorded in Step 2.

Step 13 For the power distribution box of the RSS subrack, turn inwards the ejector levers of the OMUauntil they are in position, as shown in part (2) of Installing the OMUa board.

Step 14 After replacing the power distribution box, check the following items in Table 8-2.

Table 8-2 Checklist for the replacement of the power distribution box

Item Result Action

The LEDs on the panelshow the normal powerdistribution box operation.For details about the LEDs,refer to 11.1 LEDs on theFront Panel of the RNCPower Distribution Box.

Yes Check the next item.

No

Check whether the power input cables arecorrectly connected.1. If the power input cables are not

correctly connected, power off thepower distribution box and reinstallthem.

2. If the fault persists, contact the localHuawei office for technical support.

The alarms that are causedby the power distributionbox faults are cleared.


No

To clear these alarms, refer to alarm helpinformation on the LMT. If the faultspersist, contact the local Huawei office fortechnical support.

The power distribution boxproperly supplies power toall the internal componentsof the cabinet.

Yes End the check.



Item Result Action

No

Check whether the power output cablesare correctly connected.1. If the power output cables are not

correctly connected, turn off all theswitches on the power distribution boxand the switches on the PDF. Thenreinstall the cables.


NOTE

After powering on the box, check the power supply to the internal components, as described in 5.3 PoweringOn the RNC Cabinet.

----End

PostrequisiteContact the Huawei local office to handle the replaced power distribution box.

8.20 Replacing an RNC Fan BoxWhen an RNC fan box is faulty, replace the fan box. The fan box should be replaced within oneminute.


cross screwdriver, and straight screwdriver.l The spare fan boxes are clean.

Context


CAUTIONThe replacement of the fan box may severely affects the heat dissipation of the RNC, you shouldreplace the fan box as quickly as possible, preferably within one minute. If the replacement takesa longer time, the boards may be damaged due to a high temperature.




Procedure

Step 1 By referring to Table 8-3, check the DIP switches on the PFCU of the new fan box, as shownin Figure 8-9.

Figure 8-9 Setting the DIP switches on the PFCU

Table 8-3 Address setting of the PFCU

DIP Switch Bit Status Description

SW1

1 (least significant) OFF “1”

2 ON “0”

3 ON “0”

4 (most significant) ON “0”

Step 2 Remove the captive screws from the panel of the fan box, as shown in Figure 8-10.

Figure 8-10 Pulling out the fan box

1 Handle 2 Captive screw 3 LED



Step 3 Hold the handle and pull the fan box along the guide rails. The rotation of fan blades slows downand finally stops. When the fan box is almost out of the cabinet, hold the bottom of the fan boxwith one hand and the handle with the other hand. Then pull the fan box out of the cabinet.

CAUTIONWhen replacing the fan box, do not reach your hand into the fan box. The rotation of the fanblades or the metal projections on the fan may hurt your hand.

Step 4 Keep the replaced fan box for later handling.

Step 5 Mount the new fan box into subrack along the guide rails by holding the bottom of the fan boxwith one hand and the handle with the other. Then hold the handle with both hands and push thefan box along the guide rails until the fan starts to work.

Step 6 Fasten the captives screws on the panel.

Step 7 After replacing the fan box, check the following items in Table 8-4.

Table 8-4 Checklist for the replacement of the fan box

Item Result Action

The LEDs on the panelshow the normal fanoperation. For detailsabout the LEDs, refer to11.2 LED on Fan Box.


No

1. Pull the fan box slightly. Then adjust thefan position and push the fan box in place.Check this item again.


The alarms that arecaused by fan box faultsare cleared.

Yes End the check.

No

1. To clear the faults, refer to alarm helpinformation on the LMT.


----End

PostrequisiteContact the local Huawei office to handle the replaced fan box.




9 Replacing RNC Cables

About This Chapter

This part describes how to replace the Ethernet cable, trunk cable, optical cable, alarm box signalcable, clock signal cable, and the signal monitoring cable of the power distribution box in theRNC.

9.2 Replacing an RNC Ethernet CableIt takes 5 to 20 minutes to replace an Ethernet cable, depending on the connections of the Ethernetcable.

9.3 Replacing an RNC Trunk CableThe RNC trunk cables are of two types: 75-ohm coaxial and 120-ohm twisted pair. It takes about10 minutes to replace the trunk cable.

9.4 Replacing an RNC Optical CableThe RNC optical cables are of various types such as LC/PC-SC/PC single mode optical cable,LC/PC-SC/PC multi-mode optical cable, LC/PC-FC/PC single mode optical cable, LC/PC-FC/PC multi-mode optical cable, LC/PC-LC/PC single mode optical cable, and LC/PC-LC/PCmulti-mode optical cable. It takes about five minutes to replace the optical cable.

9.5 Replacing an RNC Clock Signal CableIt takes about 5 to 20 minutes to replace a clock signal cable, depending on the connections ofthe cable.

9.6 Replacing an Alarm Box Signal CableIt takes about 5 to 20 minutes to replace an alarm box signal cable, depending on the installationpositions of the alarm box.

9.7 Replacing a Signal Monitoring Cable of the Power Distribution BoxIt takes about 10 minutes to replace a signal monitoring cable of the power distribution box.

RNCSite Maintenance Guide 9 Replacing RNC Cables


9.1 Cabling Specifications for RNC Signal CablesThe cabling specifications refer to the minimum bending radiuses of signal cables, therequirements for routing cables, and the requirements for binding cables.

Requirements for Installing RNC Signal Cablesl If the connectors of the signal cables are made before delivery, pack the connectors with

soft and durable materials to avoid damage during the cabling.

l Ensure that the jackets of the signal cables are not damaged during the cabling.

l The actual installation positions must meet the requirements of site survey and the dataconfiguration.

l The actual bending radius of the signal cable should be greater than the minimum bendingradius.

l The optical cables must be sheathed using protective pipes, that is, corrugated pipes andwinding pipes, for the cabling outside the cabinet.

l When installing the optical cables, do not step on or stretch the optical cables lest the opticalcables may be damaged.

l Use different methods to remove the optical connectors. Do not pull out the connectorsforcibly. Otherwise, the optical ports may be damaged.

l Cover the optical connectors not in use with dustproof caps.

l The TX end of the E1/T1 trunk cable must be connected to the RX end of the peer E1/T1cable.

l The RNC and the peer equipment might use different types of cables, such as the 75-ohmcoaxial cable and 120-ohm twisted pair cable. In this case, use a adapter or a transfer cablefor impedance conversion between the cables of different types.

Minimum Bending Radiuses of Signal Cables

Table 9-1 lists the requirements for the bending radiuses of signal cables. Ensure that therequirements are met.

Table 9-1 Minimum bending radiuses of signal cables

Cable Minimum Bending Radius

Ethernet cable No less than 25 mm

Optical cable No less than 40 mm

Trunk cable No less than 40 mm

Requirements for Routing RNC Signal Cablesl Separate the signal cables from the power cables. If the signal cables are crossed with the

power cables, the angle must be 90°.

9 Replacing RNC CablesRNC



l Ensure that the requirements for the bending radiuses of signal cables listed in Table 9-1are met.

l Reserve extra length of the signal cables near connectors for the convenience of insertingand pulling the connectors.

l Do not cross the signal cables over each other when routing the signal cables inside thecabinet. The signal cables shall be led out along the two sides of the subrack. The cableswhose connectors are far away from the ports shall be arranged on the outer side of thecable bundle. The cables whose connectors are near the ports shall be arranged on the innerside of the cable bundle. The cables must not cross each other. The cables shall be routedsmoothly without any tangling.

l When the signal cables are routed on the cable ladder and the distance between the cableladder and the top of the cabinet exceeds 800 mm, use a ladder to lead the signal cablesdownwards.

l Lead the signal cables into or out of the cabinet through the cable holes, as shown in Figure9-1. Before routing, remove the plastic rodent-proof cover plate from the cable holes. Afterrouting, cut the appropriate plastic rodent-proof cover plates, and cover the cable holes inthe upper and lower enclosures. Use screws to fix the cover plate that covers the cable holein the lower enclosure.

Figure 9-1 Cable holes



l Figure 9-2, Figure 9-3, and Figure 9-4 show how to route trunk cables.

Figure 9-2 Routing and binding trunk cables on cable ladder

(1) Distance between cable ties (2) Trunk cable (3) Cable ladder

Figure 9-3 Routing trunk cables up along the cable ladder

(1) Trunk cable (2) Cable ladder




Figure 9-4 Routing signal cables from the cabinet to the cable ladder

(1) Cable ladder (2) Trunk cable (3) Cable tie

l The cabling shall be in accordance with the engineering design.

l The cabling is clear, proper, and smooth at the bends. The cables are laid in parallel.

l The cabling facilitates maintenance and capacity expansion.

Requirements for Binding RNC Signal Cablesl Bind signal cables separately from power cables. When signal cables are laid parallel to

power cables, leave more than 10 mm between signal cables and power cables inside thecabinet and more than 100 mm between them outside the cabinet.

l Bind the signal cables at the inlet and outlet of the cable trough and at the bends, as shownin Figure 9-5. Do not bind the signal cables in the cable trough.

Figure 9-5 Binding signal cables at bends



l Bind optical cables in pairs at intervals of 150 mm. Cover the optical cables outside thecabinet by corrugated pipes.

l Bind the cables that are routed on the cable rack and bundle them neatly.

l Reserve extra length of the signal cables near connectors for the convenience of insertingand pulling the connectors.

l The tips of the cable ties point to the same direction. The signal cables are bound in propertightness. For indoor cable ties, cut off the surplus completely. For outdoor cable ties, leavean extra length of 3 mm to 5 mm.

l The cable ties shall be spaced evenly. For the trunk cables outside the cabinet, it isrecommended that you bind them at an interval of 1,000 mm. For the trunk cables insidethe cabinet, it is recommended to bind them at an interval of 150 mm to 200 mm. ForEthernet cables, it is recommended to bind them at an interval of 70±5 mm.

9.2 Replacing an RNC Ethernet CableIt takes 5 to 20 minutes to replace an Ethernet cable, depending on the connections of the Ethernetcable.


Ethernet cable tester, Ethernet cable pliers, and diagonal pliers.

l The materials such as cable tie or wax string are ready.

l The new Ethernet cable is ready.

Context


CAUTIONl The replacement of the Ethernet cables of the LMT interrupts the communications between

the LMT and the BAM.

l The ports on the SCUa boards for inter-subrack connections support the port trunkingfunction. The replacement of either cable does not have negative effect on the RNC.

l For the FG2a, when the RNC is connected to the peer equipment by using only the Ethernetcables, all the services between them are interrupted during the replacement.

l The OMUa board is configured with two Ethernet cables. The replacement of either cabledoes not affect the services.




Confirm the quantity, length, and type of the Ethernet cable to be replaced. Ethernet cables ofdifferent manufacturers differ in color and diameter. Ensure that the new Ethernet cable iscompatible with the cable to be replaced.

Procedure

Step 1 Prepare a new Ethernet cable with a proper length and the correct type. Note that an extra lengthshould be reserved.

Step 2 Make the RJ-45 connector for the new cable by referring to Making Connectors.

Step 3 Stick a temporary label to the new cable to distinguish it from the others.It is recommended that the content on the temporary label is consistent with that on the old label.

Step 4 Lay out the new Ethernet cable according to the original connections. If the field connectionsare different, route the cable as required.

Step 5 Disconnect the Ethernet cable to be replaced from the ports.

Step 6 Connect the new Ethernet cable to the original ports.

Step 7 Replace the temporary label on the new cable with the engineering label.

The content on the engineering label must be consistent with that on the temporary label. Fordetails, refer to Engineering Labels of Cables.

Step 8 Bind the new Ethernet cable.

Step 9 Check the items as listed in Table 9-2.

Table 9-2 Checking the new cables

Item Result Action

The connection iscorrect.


No Remove the cable and reconnect it.

The connector of thecable is properlyinserted into the port.


No Secure the connection of the connector.

The alarms that arecaused by networkcommunicationfailures are cleared.


No

To clear these alarms, refer to alarm helpinformation on the LMT. If the faults persist,contact the local Huawei office for technicalsupport.

In DOS mode, use thePing command tocheck whether the twosides connected by thecable can properlycommunicate witheach other.

Yes End the check.

No Check the continuity of the Ethernet cable. Ifthe cable is faulty, replace it with a new one.



----End

PostrequisiteHandle the replaced Ethernet cable in a proper way without polluting the environment.

9.3 Replacing an RNC Trunk CableThe RNC trunk cables are of two types: 75-ohm coaxial and 120-ohm twisted pair. It takes about10 minutes to replace the trunk cable.


straight screwdriver, and diagonal pliers.


l The new trunk cable is ready.

Context


CAUTIONl The replacement of the trunk cable interrupts all the services carried on the trunk cable.

l When the RNC and its peer end are connected by using only the trunk cable, all the servicesbetween the RNC and its peer end are interrupted during the replacement.

Confirm the quantity, length, and type of the trunk cable to be replaced. The trunk cable can bea 75-ohm coaxial cable or a 120-ohm twisted pair cable.

Procedure

Step 1 Prepare a new trunk cable with a proper length and the correct type. Ensure that an extra lengthis reserved.

Step 2 Make a connector for the trunk cable to the DDF by referring to Making Connectors.

Step 3 Stick a temporary label to each new cable to distinguish it from the others. It is recommendedthat the content on the temporary label be consistent with that on the old label.




Step 4 Lay out the new trunk cable according to the original connections. If the field connections aredifferent, route the trunk cable as required.

Step 5 On the RNC side, remove the retention screws on the trunk cable connector by using a straightscrewdriver. Disconnect the trunk cable to be replaced from the RNC and take off the ESD wriststrap.

Step 6 Disconnect the trunk cable from the DDF.

Step 7 Connect the new trunk cable to the original ports on the RNC (using the ESD wrist strap) andDDF.

Step 8 Replace the temporary labels on the new cable with the engineering labels.


Step 9 Bind the new trunk cable.

Step 10 After replacing the trunk cable, check the following items in Table 9-3.

Table 9-3 Checklist for the replacement of the trunk cable

Item Result Action



No Remove the trunk cable and reconnect it.

The connectors of thetrunk cable areproperly inserted intothe ports.



The alarms that arecaused by opticalcable faults arecleared.

Yes End the check.

No


----End

PostrequisiteHandle the replaced trunk cable in a proper way without polluting the environment.

9.4 Replacing an RNC Optical CableThe RNC optical cables are of various types such as LC/PC-SC/PC single mode optical cable,LC/PC-SC/PC multi-mode optical cable, LC/PC-FC/PC single mode optical cable, LC/PC-FC/PC multi-mode optical cable, LC/PC-LC/PC single mode optical cable, and LC/PC-LC/PCmulti-mode optical cable. It takes about five minutes to replace the optical cable.




dustfree cotton cloth, fiber cleaner, and diagonal pliers.


l The new optical cable is ready.

l Confirm the quantity, length, and type of the optical cables to be replaced.

Context


CAUTIONl When replacing the optical cable, do not look into the optical connector lest the beam should

hurt your eyes.

l When the RNC and the other NEs are connected by using optical ports that work in backupmode, the replacement of one optical cable does not affect the services of the RNC. Whenthe RNC and the other NEs are not connected by using such ports, the replacement interruptsall the services on the optical cable.

l When the RNC and its peer equipment are connected by using only the optical cable, all theservices between the RNC and its peer equipment are interrupted during the replacement.

Procedure

Step 1 Stick a temporary label to the new cable to distinguish it from the others. It is recommended thatthe content on the temporary label be consistent with that on the old label.

Step 2 Lay out the new optical cable according to the original connections. If the field connections aredifferent, route the optical cable as required.

Step 3 Disconnect the optical cable to be replaced.

If ... Then ...

The type of the connector is LC/PC or SC/PC.

Press the tab on the connector and pull the cableout.

The type of the connector is FC/PC. Unscrew the optical connector anticlockwise.




NOTE

If the removed optical cable is not damaged, protect the connectors by using the dustproof caps. If anyconnector is dirty, clean it by using the dustfree cotton cloth or fiber cleaner.

Step 4 Remove the dustproof cap from the optical connector and keep the cap properly for a later use.Connect the new cable to the original ports.

CAUTIONFor the LC/PC, SC/PC, or FC/PC connector, the TX end and the RX end must be correctlyconnected by referring to the temporary label. Otherwise, the optical signals cannot be receivedor transmitted.

Step 5 Replace the temporary labels on the new cable with the engineering labels. The content on theengineering label must be consistent with that on the temporary label. For details, refer to theEngineering Labels of Cables.

Step 6 Bind the new optical cable.

Step 7 Check the items as listed in Table 9-4.

Table 9-4 Checklist for the replacement of the optical cable

Item Result Action




The connector of theoptical cable isproperly insertedinto the port.



The alarms that arecaused by opticalcable faults arecleared.

Yes End the check.

No


----End

PostrequisiteHandle the replaced optical cables in a proper way without polluting the environment.

9.5 Replacing an RNC Clock Signal CableIt takes about 5 to 20 minutes to replace a clock signal cable, depending on the connections ofthe cable.



Prerequisitel The tools for replacing the alarm box signal cable are ready. The tools are ESD wrist strap

and diagonal pliers.l The materials such as cable tie or wax string are ready.

l The new clock signal cable is ready.

Context


Procedure

Step 1 Stick a temporary label to the new cable to distinguish it from the others. It is recommended thatthe content on the temporary label be consistent with that on the old label.

Step 2 Lay out the new cable according to the original connections. If the field connections are different,route the cable as required.

Step 3 Disconnect the clock signal cable.

Step 4 Connect the new clock signal cable to the original ports.



Step 6 Bind the new clock signal cable.

Step 7 After replacing the clock cable, check the following items in Table 9-5.

Table 9-5 Checklist for the replacement of the clock signal cable

Item Result Action




The connector of theclock cable is properlyinserted into the port.



The alarms that arecaused by clock signalcable faults arecleared.

Yes End the check.

No





----End

PostrequisiteHandle the replaced clock signal cable in a proper way without polluting the environment.

9.6 Replacing an Alarm Box Signal CableIt takes about 5 to 20 minutes to replace an alarm box signal cable, depending on the installationpositions of the alarm box.

Prerequisitel The tools for replacing the alarm box signal cable are ready. The tools are ESD glove, ESD

wrist strap, and diagonal pliers.l The materials such as cable tie or wax string are ready.

l The new alarm box signal cable is ready.

Context

CAUTIONThe communications between the alarm box and the LMT are interrupted during thereplacement.

Procedure

Step 1 Put on the ESD glove.

Step 2 Lay out the new signal cable according to the original connections. If the field connections aredifferent, route the cable as required.

Step 3 Loosen the DB9 or DB25 connector. Then remove the alarm box signal cable from the LMTthat forwards alarms.

Step 4 On the alarm box side, power off the alarm box, unlock the alarm box, remove the front panel,and then disconnect the alarm box signal cable.

Step 5 Link the new signal cable to the LMT computer and the alarm box by referring to the originalconnections of the signal cable.

Step 6 Reinstall the front panel and lock the alarm box.

Step 7 Attach the engineering labels to both ends of the new alarm box signal cable. The content onthe new label must be the same as that on the old one.

Step 8 Power on the alarm box.

Step 9 Test the alarm box by referring to the document delivered with the alarm box.



Step 10 When the LED on the front panel of the alarm box shows abnormal communication on the serialport, check the connection.

----End

PostrequisiteHandle the replaced signal cable in a proper way without polluting the environment.

9.7 Replacing a Signal Monitoring Cable of the PowerDistribution Box

It takes about 10 minutes to replace a signal monitoring cable of the power distribution box.

Prerequisitel The tools for replacing the signal monitoring cable are ready. The tools are ESD wrist strap

and diagonal pliers.


l The new signal monitoring cable is ready.

Context


Procedure

Step 1 Stick a temporary label to the new cable to distinguish it from the others. It is recommended thatcontent on the temporary label be consistent with that on the old label.

Step 2 Route the signal monitoring cable.

Step 3 Disconnect the signal monitoring cable to be replaced from the ports.

Step 4 Connect the new signal monitoring cable to the original ports.



Step 6 Bind the signal monitoring cable.

Step 7 After replacing the signal monitoring cable of the power distribution box, check the followingitems in Table 9-6.




Table 9-6 Checklist for the replacement of the signal monitoring cable

Item Result Action



No Remove the signal monitoring cable andreconnect it.

The connector of thesignal monitoring cableis properly inserted intothe port.


No Secure the joint.

The LEDs on the panelshow the normal powerdistribution boxoperation. For detailsabout the LEDs, refer to11.1 LEDs on theFront Panel of theRNC PowerDistribution Box.


No Contact the local Huawei office for technicalsupport.

The alarms that arecaused by the signalmonitoring cable faultsare cleared.

Yes End the check.

No


----End

PostrequisiteHandle the replaced signal monitoring cable in a proper way without polluting the environment.



10 Expanding the Capacity of the RNC

About This Chapter

This part describes how to expand the capacity of the RNC. The capacity of the RNC can beexpanded by adding the RBS or SPM.

10.1 Adding an SPMWhen the RNC capacity cannot meet the traffic requirements, the SPM must be added.

10.2 Adding an RBS SubrackWhen the RNC capacity cannot meet the traffic requirements, the RBS subrack must be added.

RNCSite Maintenance Guide 10 Expanding the Capacity of the RNC


10.1 Adding an SPMWhen the RNC capacity cannot meet the traffic requirements, the SPM must be added.

Prerequisitel The LMT is started and the LMT properly communicates with the BAM.

l The installation space for the new SPM is available in the RSS/RBS subrack.

l Ensure that the program files of the boards in the directory \BAM active workspaceinstallation directory\LoadData on the BAM are correct.

Context


NOTE

The addition of the SPM does not affect the existing services.

Procedure

Step 1 Install the SPUa boards and DPUbs of the new SPM into the subrack, as described in 8.2.2Inserting the RNC Board.



If... Then...

Only one SPUa is configured and CPU status of the SPUa and DPUb isNormal.

Go to Step 4.

Two SPUa boards are configured. CPU status of one SPUa and the DPUbare Normal. CPU status of the other SPUa is Standby normal

Go to Step 4.



10 Expanding the Capacity of the RNCRNC



If... Then...



2. Go to Step 2.



If... Then...


Go to Step 5.



3. Go to Step 2.

NOTE



----End

10.2 Adding an RBS SubrackWhen the RNC capacity cannot meet the traffic requirements, the RBS subrack must be added.

Prerequisitel The devices for adding the RBS subrack are ready. The devices are RBS subrack and

screws.


l The installation space for the new RBS is available in the cabinet.

l Ensure that the program files of the boards in the directory \BAM active workspaceinstallation directory\LoadData on the BAM are correct.



Context


NOTE

The addition the RBS subrack does not affect the existing services.

Procedure

Step 1 According to the location of the RBS subrack, set the DIP switches on the new subrack byreferring to 12.1 DIP Switches on RNC Subracks.

Step 2 Set the switches on the power distribution box for the subrack to OFF.For the function of each switch, refer to the label on the front panel of the power distributionbox, as shown in 5.2 Layout of Power Switches on the RNC Cabinet.

Step 3 Start the LMT.

Step 4 Two persons hold the mounting ears and the bottom of the new subrack at the front of the cabinetand slowly push the subrack along the guide rails into the cabinet. Then fasten the screws to fixthe subrack.

Step 5 Connect the power cables to the new subrack, as shown in Connections of Power Cables andPGND Cables in the RNC Cabinet.

Step 6 Install the boards in the new subrack as described in 8.2.2 Inserting the RNC Board.

Step 7 Install the two pairs of Ethernet cables that connect the SCUa boards in the RBS and the RSS.

Step 8 Connect the other cables to the new subrack.

Step 9 If the newly added subrack is located at the bottom of the cabinet, connect the signal monitoringcable of the power distribution box to the subrack.

Step 10 Check the connections of cables to new subrack.

Step 11 Turn on the switch on the power distribution box for the new subrack.

Step 12 Start the LMT. In the upper right part of the window, check the configuration mode of the RSSsubrack (subrack 0), as shown in the red-circled part of Figure 10-1.

If... Then...

The configuration mode of subrack 0 is notonline.

1. Run the SET ONLINE command on theLMT to change the configuration mode ofsubrack 0 to online.

2. Go to Step 13.




If... Then...

The configuration mode of subrack 0 isonline.

Go to Step 13.

Figure 10-1 Checking the configuration mode of subrack 0

Step 13 Run the ADD SUBRACK command to download program files to the new subrack.

Step 14 Execute the configuration script of the new subrack in batches.

Step 15 The download is complete about 10 minutes later. Then check the device panel.


If... Then...



2. Go to Step 16.





If... Then...


Go to Step 18.



3. Go to Step 16.

NOTE



----End




11 LEDs on RNC Boards

About This Chapter

This part describes the LEDs on the panels of the power distribution boxes, fan box, and RNCboards.

11.1 LEDs on the Front Panel of the RNC Power Distribution BoxThe power distribution box has two LEDs on its front panel. The two LEDs are labeled RUNand ALM.

11.2 LED on Fan BoxLED STATUS is on the front panel of the fan box. The LED blinks red or green, indicatingdifferent operational statuses of the fan box.

11.3 LEDs on the OMUa BoardThere are five LEDs on the panel of the OMUa board. The five LEDs are RUN, ALM, ACT,HD, and OFFLINE.

11.4 LEDs on the CSUa BoardThere are 11 LEDs on the panel of the CSUa board. Among them, three LEDs are RUN,ALM, and ACT. The other 8 LEDs are used to indicate the status of 10/100/1000BASE-T ports.Each 10/100/1000BASE-T port has two LEDs. The two LEDs are LINK and ACT.

11.5 LEDs on the SCUa BoardThere are 27 LEDs on the panel of the SCUa board. Among them, three LEDs are RUN,ALM, and ACT. The other 24 LEDs are used to indicate the status of 10/100/1000BASE-T ports.Each 10/100/1000BASE-T port has two LEDs. The two LEDs are LINK and ACT.

11.6 LEDs on the SPUa BoardThere are five types of LEDs on the panel of the SPUa board. The five types of LEDs areRUN, ALM, ACT (indicating board work mode), LINK, and ACT (beside the Ethernet port).

11.7 LEDs on the DPUb BoardThere are three LEDs on the panel of the DPUb board. The three LEDs are RUN, ALM, andACT.

11.8 LEDs on the GCUa/GCGa BoardThere are three LEDs on the panel of the GCUa/GCGa board. The three LEDs are RUN,ALM, and ACT.

RNCSite Maintenance Guide 11 LEDs on RNC Boards


11.9 LEDs on the AEUa BoardThere are three LEDs on the panel of the AEUa board. The three LEDs are RUN, ALM, andACT.

11.10 LEDs on the AOUa BoardThere are three LEDs on the panel of the AOUa board. The three LEDs are RUN, ALM, andACT.

11.11 LEDs on the UOIa BoardThere are three LEDs on the panel of the UOIa board. The three LEDs are RUN, ALM, andACT.

11.12 LEDs on the PEUa BoardThere are three LEDs on the panel of the PEUa board. The three LEDs are RUN, ALM, andACT.

11.13 LEDs on the FG2a BoardAmong all the LEDs on the panel of the FG2a board, three are RUN, ALM, and ACT. The otherLEDs are used to indicate the status of Ethernet ports. Each Ethernet port has two LEDs. Thetwo LEDs are LINK and ACT.

11.14 LEDs on the GOUa BoardThere are three LEDs on the panel of the GOUa board. The three LEDs are RUN, ALM, andACT.

11 LEDs on RNC BoardsRNC



11.1 LEDs on the Front Panel of the RNC Power DistributionBox

The power distribution box has two LEDs on its front panel. The two LEDs are labeled RUNand ALM.

Table 11-1 describes the LEDs on the front panel of the power distribution box.

Table 11-1 LEDs on the front panel of the power distribution box

LED Color Status Meaning

RUN Green On for 1 s and offfor 1 s

The MDMC works properly andcommunicates with the SCUa properly.

On for 0.125 s andoff for 0.125 s

The MDMC is not working or it does notcommunicate with the SCUa properly.

Off There is no power supply for the MDMCor the power distribution box breaks down.

ALM Red Off There is no alarm concerning the powerdistribution box.

On The power distribution box is faulty.During the MDMC self-test, however, theALM LED is always on. It is an indicationthat the ALM LED is functional.

11.2 LED on Fan BoxLED STATUS is on the front panel of the fan box. The LED blinks red or green, indicatingdifferent operational statuses of the fan box.

Table 11-2 describes the different meanings that the LED indicates.

Table 11-2 LED on the fan box

Color

Status Meaning

Red On for 1 s and offfor 1 s

The fan box is registered and has one of the followingproblems:l One-way power supply to the subrack

l Communication failure

l Fan box blocked

l Fan box overtemperature or temperature sensor failure



Color

Status Meaning


The fan box is not registered and has one of the followingproblems:l One-way power supply to the subrack

l Fan box blocked

l Fan box overtemperature or temperature sensor failure

Green On for 1 s and offfor 1 s

The fan box is supplied with power in two ways without anyfault (and has been registered).


The fan box is supplied with power in two ways without anyfault (not registered).

NOTE

The fan box is registered, that is, the communication is established between the fan box and the SCUaboard which is located in the same subrack with the fan box.

11.3 LEDs on the OMUa BoardThere are five LEDs on the panel of the OMUa board. The five LEDs are RUN, ALM, ACT,HD, and OFFLINE.

Table 11-3 describes the LEDs on the OMUa board.

Table 11-3 LEDs on the OMUa board


RUN Green On for 1 s and off for 1 s The board works properly.

On for 2 s and off for 2 s The board is under commissioning.

On for 0.125 s and off for0.125 s

The board is being started.

On There is power supply, but the boardis faulty.

Off There is no power supply, or theboard is faulty.

ALM Red Off There is no alarm.

On or flashing There is one or more fault alarm.

ACT Green On The board works in active mode.

Off The board works in standby modeor the board is not connected.





OFFLINE Blue On The board can be removed.

Off The board cannot be removed.


The board is being switched over tothe other work mode.

HD Green Off There is no read or write on the harddisk.

Flashing The hard disk is being read orwritten.

11.4 LEDs on the CSUa BoardThere are 11 LEDs on the panel of the CSUa board. Among them, three LEDs are RUN,ALM, and ACT. The other 8 LEDs are used to indicate the status of 10/100/1000BASE-T ports.Each 10/100/1000BASE-T port has two LEDs. The two LEDs are LINK and ACT.

Table 11-4 describes the LEDs on the CSUa board.

Table 11-4 LEDs on the CSUa board




The board is in loading state.







Off The board works in standby mode.

LINK (Besidethe Ethernetport)

Green On The link is well connected.

Off The link is broken.

ACT (Besidethe Ethernetport)

Green Off There is no data transmission overthe Ethernet port.




Flashing There is data transmission over theEthernet port.

11.5 LEDs on the SCUa BoardThere are 27 LEDs on the panel of the SCUa board. Among them, three LEDs are RUN,ALM, and ACT. The other 24 LEDs are used to indicate the status of 10/100/1000BASE-T ports.Each 10/100/1000BASE-T port has two LEDs. The two LEDs are LINK and ACT.

Table 11-5 describes the LEDs on the SCUa board.

Table 11-5 LEDs on the SCUa board


















11.6 LEDs on the SPUa BoardThere are five types of LEDs on the panel of the SPUa board. The five types of LEDs areRUN, ALM, ACT (indicating board work mode), LINK, and ACT (beside the Ethernet port).




Table 11-6 describes the LEDs on the SPUa board.

Table 11-6 LEDs on the SPUa board


















11.7 LEDs on the DPUb BoardThere are three LEDs on the panel of the DPUb board. The three LEDs are RUN, ALM, andACT.

Table 11-7 describes the LEDs on the DPUb board.

Table 11-7 LEDs on the DPUb board













ACT Green On The board works properly.


11.8 LEDs on the GCUa/GCGa BoardThere are three LEDs on the panel of the GCUa/GCGa board. The three LEDs are RUN,ALM, and ACT.

Table 11-8 describes the LEDs on the GCUa/GCGa board.

Table 11-8 LEDs on the GCUa/GCGa board


RUN Green On for 1 s and off for 1s

The board works properly.

On for 0.125 s and offfor 0.125 s


On for 2 s and off for 2s

The board is undercommissioning.

On There is power supply, but theboard is faulty.





Off The board works in standbymode.




11.9 LEDs on the AEUa BoardThere are three LEDs on the panel of the AEUa board. The three LEDs are RUN, ALM, andACT.

Table 11-9 describes the LEDs on the AEUa board.

Table 11-9 LEDs on the AEUa board












11.10 LEDs on the AOUa BoardThere are three LEDs on the panel of the AOUa board. The three LEDs are RUN, ALM, andACT.

Table 11-10 describes the LEDs on the AOUa board.

Table 11-10 LEDs on the AOUa board















11.11 LEDs on the UOIa BoardThere are three LEDs on the panel of the UOIa board. The three LEDs are RUN, ALM, andACT.

Table 11-11 describes the LEDs on the UOIa board.

Table 11-11 LEDs on the UOIa board












11.12 LEDs on the PEUa BoardThere are three LEDs on the panel of the PEUa board. The three LEDs are RUN, ALM, andACT.

Table 11-12 describes the LEDs on the PEUa board.




Table 11-12 LEDs on the PEUa board












11.13 LEDs on the FG2a BoardAmong all the LEDs on the panel of the FG2a board, three are RUN, ALM, and ACT. The otherLEDs are used to indicate the status of Ethernet ports. Each Ethernet port has two LEDs. Thetwo LEDs are LINK and ACT.

Table 11-13 describes the LEDs on the FG2a board.

Table 11-13 LEDs on the FG2a board





















11.14 LEDs on the GOUa BoardThere are three LEDs on the panel of the GOUa board. The three LEDs are RUN, ALM, andACT.

Table 11-14 describes the LEDs on the GOUa board.

Table 11-14 LEDs on the GOUa board















12 DIP Switches on RNC Components

About This Chapter

This part describes the DIP switches on the RNC subracks and RNC boards.

12.1 DIP Switches on RNC SubracksThe DIP switch on the RSS subrack is the same as that on the RBS subrack. The DIP switchesare used to set the subrack number.

12.2 DIP Switches on the AEUa BoardThe AEUa board provides five DIP switches, namely, S2, S4, S6, S8, and S10.

12.3 DIP Switches on the AOUa BoardThe AOUa board has two DIP switches which are both SW1. The two DIP switches controlsthe mode setting of the two STM-1/OC-3 optical ports.

12.4 DIP Switches on the PEUa BoardThe PEUa board provides five DIP switches, namely, S2, S4, S6, S8, and S10.

12.5 DIP Switch on the MDMC BoardThe MDMC board provides one DIP switch. The DIP switch is S2.

12.6 DIP Switches on the PFCU BoardThe PFCU board has one DIP switch. The DIP switch is SW1 and consists of four bits. The DIPswitch is used to set the address of the PFCU board.

RNCSite Maintenance Guide 12 DIP Switches on RNC Components


12.1 DIP Switches on RNC SubracksThe DIP switch on the RSS subrack is the same as that on the RBS subrack. The DIP switchesare used to set the subrack number.

Location of the DIP switches

The DIP switches are located on the back of the RSS subrack and the RBS subrack, as shownin Components of the RNC Subrack.

Appearance of DIP Switch

Figure 12-1 shows the area of the DIP switch.

Figure 12-1 DIP switch

Description of DIP Switches

The DIP switch on the RNC subrack has eight bits. The higher the bit is, the more significant itis. If the bit is set to ON, it indicates 0. If the bit is set to OFF, it indicates 1. Table 12-1 providesthe definitions of the bits.

Table 12-1 Bits of the DIP switch

Bit Meaning

1, the least significantbit

Subrack number setting bit

2 Subrack number setting bit




6 Parity check bit

7 Not used in the RNC and is usually set to 0

12 DIP Switches on RNC ComponentsRNC



Bit Meaning

8, the most significantbit

l If bit 8 is set to 0, the SCUa board can be started only by theloading on the OMUa board.

l If bit 8 is set to 1, a loading request is sent to the OMUa boardbefore the SCUa board is started. If the OMUa board respondswithin 30 s, the SCUa board is started by the loading on the OMUaboard. If the OMUa board fails to respond within 30 s, the SCUaboard is started by the loading on Flash.

For RNC, bit 8 is usually set to 1.

Setting of DIP switchesTable 12-2 shows the setting of the DIP switches for the RNC subracks. Subrack 0 is an RSSsubrack. Subracks 1–5 are RBS subracks.

Table 12-2 Setting of DIP switches for RNC subracks

SubrackNumber

Bit

1 2 3 4 5 6 7 8

Subrack 0 ON ON ON ON ON ON ON OFF

Subrack 1 OFF ON ON ON ON OFF ON OFF

Subrack 2 ON OFF ON ON ON OFF ON OFF

Subrack 3 OFF OFF ON ON ON ON ON OFF

Subrack 4 ON ON OFF ON ON OFF ON OFF

Subrack 5 OFF ON OFF ON ON ON ON OFF

12.2 DIP Switches on the AEUa BoardThe AEUa board provides five DIP switches, namely, S2, S4, S6, S8, and S10.

Layout of DIP Switches on the AEUa BoardFigure 12-2 shows the DIP switches on the AEUa board.



Figure 12-2 DIP switches on the AEUa board

(1) Sub-board (2) Bottom plate

CAUTIONl All DIP switches of the PEUa are on the front panel of the sub-board. The front panel is faced

to and combined with the bottom plate, and so the DIP switches are hidden in between.

l DIP switches S2, S4, S6, S8, and S10 are set from the side. As shown in Figure 12-2, thereare two square holes between sub-boards, one between sub-boards S2 and S4, and the otherbetween sub-boards S8 and S6. Through the holes, you can set DIP switches S2, S4, S8, andS6. S10 is located in the right corner of the sub-board where you can set it along the side.

l To set S2, S4, S6, or S8 to ON, move the DIP switch inwards. To set S2, S4, S6, or S8 toOFF, move the DIP switch outwards. To set S10 to ON, move it outwards. To set S10 toOFF, move it inwards.





S2, S4, S6, and S8 on the AEUa are used to enable or disable the grounding of 0 to 31 E1s/T1s/J1s at the TX end. S10 is used to set E1 in balanced mode or unbalanced mode, and T1 or J1 inwork mode. Figure 12-2 describes S2, S4, S6, S8, and S10 in detail.

Table 12-3 DIP switches on the AEUa board

DIPSwitch

Bit Description Status Meaning

S2 1 to 8 TX ground switch ofE1s/T1s/J1s 24 to 31

ON Setting workmode to E1unbalancedmode

OFF Setting workmode to othermodes










S10 1 to 2 DIP switch for settingwork mode. It consists oftwo bits.

(ON, ON) Setting workmode to E1unbalancedmode

(OFF, ON) Setting workmode to E1balanced mode



DIPSwitch


(ON, OFF) Setting workmode to T1 mode

(OFF, OFF) Setting workmode to J1 mode

NOTE

l If signals are transmitted in E1 unbalanced mode, the signals are transmitted through the 75-ohm coaxialcable and the TX end of the cable is grounded, that is, the corresponding DIP switch is set to ON. Ifsignals are transmitted in other modes, the signals are transmitted through the 120-ohm twisted paircable and the TX end of the cable is not grounded, that is, the corresponding DIP switch is set to OFF.

l All the DIP switches are set to E1 balanced mode by default, that is, all the bits of S2, S4, S6, and S8are set to OFF. For S10, the first bit is set to OFF and the second to ON.

l Ensure that the matching between the different types of DIP switches is correct.

12.3 DIP Switches on the AOUa BoardThe AOUa board has two DIP switches which are both SW1. The two DIP switches controlsthe mode setting of the two STM-1/OC-3 optical ports.

Allocation of DIP Switches on AOUa BoardFigure 12-3 shows the DIP switches on the AOUa board.




Figure 12-3 DIP switches on the AOUa board

Description of DIP SwitchesTable 12-4 describes the switches on the AOUa board.

Table 12-4 DIP switches on the AOUa board

DIP Switch Bit Status Meaning

S1 1–2 (ON, ON) Setting loading modeto JTAG configuration

(OFF, OFF) Setting loading modeto CPU slave parallelconfiguration

3 ON Setting work mode toT1 mode




OFF Setting work mode toE1 mode

4 ON Setting the mappedpath to AU3.

OFF Setting the mappedpath to AU4.

5 ON Setting theinformation structureto TU11.

OFF Setting theinformation structureto TU12.

6 ON SONET

OFF SDH

7 – Reserved

8 – Reserved

NOTE

All the bits are set to OFF by default.

12.4 DIP Switches on the PEUa BoardThe PEUa board provides five DIP switches, namely, S2, S4, S6, S8, and S10.

Layout of DIP Switches on the PEUa BoardFigure 12-4 shows the DIP switches on the PEUa board.




Figure 12-4 DIP switches on the PEUa board

(1) Sub-board (2) Bottom plate

CAUTIONl All DIP switches of the PEUa are on the front panel of the sub-board. The front panel is faced

to and combined with the bottom plate, and so the DIP switches are hidden in between.

l DIP switches S2, S4, S6, S8, and S10 are set from the side. As shown in Figure 12-4, thereare two square holes between sub-boards, one between sub-boards S2 and S4, and the otherbetween sub-boards S8 and S6. Through the holes, you can set DIP switches S2, S4, S8, andS6. S10 is located in the right corner of the sub-board where you can set it along the side.

l To set S2, S4, S6, or S8 to ON, move the DIP switch inwards. To set S2, S4, S6, or S8 toOFF, move the DIP switch outwards. To set S10 to ON, move it outwards. To set S10 toOFF, move it inwards.




S2, S4, S6, and S8 on the PEUa are used to enable or disable the grounding of 0 to 31 E1s/T1s/J1s at the TX end. S10 is used to set E1 in balanced mode or unbalanced mode, and T1 or J1 inwork mode. Table 12-5 describes S2, S4, S6, S8, and S10 in detail.

Table 12-5 DIP switches on the PEUa board

DIPSwitch














S10 1 to 2 DIP switch for settingwork mode. It consists oftwo bits.

(ON, ON) Setting workmode to E1unbalancedmode

(OFF, ON) Setting workmode to E1balanced mode




DIPSwitch


(ON, OFF) Setting workmode to T1 mode

(OFF, OFF) Setting workmode to J1 mode

NOTE

l If signals are transmitted in E1 unbalanced mode, the signals are transmitted through the 75-ohm coaxialcable and the TX end of the cable is grounded, that is, the corresponding DIP switch is set to ON. Ifsignals are transmitted in other modes, the signals are transmitted through the 120-ohm twisted paircable and the TX end of the cable is not grounded, that is, the corresponding DIP switch is set to OFF.

l All the DIP switches are set to E1 balanced mode by default, that is, all the bits of S2, S4, S6, and S8are set to OFF. For S10, the first bit is set to OFF and the second ON.

l Ensure that the matching between the different types of DIP switches is correct.

12.5 DIP Switch on the MDMC BoardThe MDMC board provides one DIP switch. The DIP switch is S2.

Figure 12-5 shows the DIP switch on the MDMC board.

Figure 12-5 DIP switch on the MDMC board

With four bits, the DIP switch S2 is used to set the address of the WDMB.

To set the address, pull out the WDMB as described in the 8.4 Replacing an MDMC Board.Then, set S2 as listed in Table 12-6.

Table 12-6 DIP switch on the WDMB


S2 1, the mostsignificant bit

ON 0

2 ON 0

3 ON 0




4, the leastsignificant bit

ON 0

CAUTIONIn the RNC, the address of the MDMC board is 0 by default. Therefore, the DIP switch on theMDMC board must be set as described in Table 12-6.

12.6 DIP Switches on the PFCU BoardThe PFCU board has one DIP switch. The DIP switch is SW1 and consists of four bits. The DIPswitch is used to set the address of the PFCU board.

Figure 12-6 shows the DIP switch on the PFCU board.

Figure 12-6 DIP switch on the PFCU board

To set the address, pull out the fan box. Then, set the DIP switch as described in Table 12-7.For how to pull out the fan box, refer to 8.20 Replacing an RNC Fan Box. After the setting,the address of the PFCU board is 1.

Table 12-7 DIP switch on the PFCU board


SW1 1, the least significant bit OFF 1

2 ON 0

3 ON 0

4, the most significant bit ON 0




13 RNC site maintenance record

This part provides the record for RNC site maintenance.

Table 13-1 RNC site maintenance record

Site name: Date:

Time of fault occurrence: Time of fault clearing:

Person on duty: Operator:

Maintenancetypes:

□ Replacingboard □ Replacing cable □ Replacing subrack, fan

box, or power distribution box

□ Routinecleaning

□ Adding subrackor SPM □ Others

Fault causes forreplaced parts:

Maintenance content and methods:

Commissioning results:

RNCSite Maintenance Guide 13 RNC site maintenance record


Huawei RNC Site Maintenance Guide

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