Huawei BTS3702E 2500 User Manual

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DBS3900 WiMAX

V300R002

Site Maintenance Guide

Issue 01

Date 2009-11-30

Huawei Proprietary and Confidential

Page 2

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

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

Bantian, Longgang Shenzhen 518129 People's Republic of China

Website: http://www.huawei.com

Email: support@huawei.com

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

Trademarks and Permissions

and other Huawei trademarks are the property of Huawei Technologies Co., Ltd.

All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice

The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute the warranty of any kind, express or implied.

Huawei Proprietary and Confidential

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DBS3900 WiMAX Site Maintenance Guide (Draft) Contents

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

1 Preparations for Site Maintenance.........................................................................................1-1

2 Tasks of Routine Hardware Maintenance.............................................................................2-1

2.1 Maintenance of Power Supply System and Grounding System of the BTS3702E.........................................2-2

2.2 Maintenance of BTS3702E Main Equipment.................................................................................................2-2

2.3 Maintenance of Cables....................................................................................................................................2-3

3 Powering On and Powering Off the BTS3702E....................................................................3-1

3.1 Powering On the BTS3702E...........................................................................................................................3-2

3.2 Powering Off the BTS3702E..........................................................................................................................3-4

4 Replacing the BTS3702E Modules..........................................................................................4-1

5 Replacing the Optical Modules ..............................................................................................5-1

6 Replacing the Power Modules ................................................................................................6-1

7 Replacing the BTS3702E Cables..............................................................................................7-1

7.1 Replacing the Power Cables of the BTS3702E...............................................................................................7-2

7.2 Replacing the Signal Cables of the BTS3702E...............................................................................................7-3

7.3 Replacing the Transmission Cables of the BTS3702E...................................................................................7-4

7.3.1 Replacing the Ethernet Cables...............................................................................................................7-4

7.3.2 Replacing the Optical Fibers..................................................................................................................7-5

7.4 Replacing the RF Jumpers of the BTS3702E..................................................................................................7-6

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DBS3900 WiMAX Site Maintenance Guide (Draft) Tables

Tables

Table 2-1 Maintenance tasks for the power supply system and grounding system of the BTS3702E.................2-2

Table 2-2 Maintenance tasks of the BTS3702E...................................................................................................2-3

Table 2-3 Maintenance items for cables...............................................................................................................2-3

Table 3-1 Meanings of the BTS3702E indicators................................................................................................3-2

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DBS3900 WiMAX Site Maintenance Guide (Draft) About This Document

About This Document

Overview

After completing the deployment and acceptance test of the BTS3702E, Huawei conducts routine maintenance to ensure that the BTS3702E operates in its optimum capacity.

The document describes the tasks of the routine hardware maintenance of the BTS3702E, including the maintenance of the power supply system and grounding system, the maintenance of the BTS3702E main equipment, and the maintenance of the cables. In addition, the document provides guidance for the replacement of modules and cables.

Version

The following table lists the product version related to this document.

Product Name Version

BTS3702E V300R002

Intended Audience

This document is intended for:

l System engineers

l Site maintenance personnel

Change History

Version Change History

01(2009-11-25) This is the initial release.

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Organization

1 Preparations for Site Maintenance

The preparations for the maintenance of the BTS3702E site include obtaining site information, selecting maintenance tasks, and preparing maintenance tools and spare parts.

2 Tasks of Routine Hardware Maintenance

The tasks of the routine hardware maintenance of the BTS3702E include the maintenance of the power supply system and grounding system, the maintenance of the main equipment of the BTS3702E, and the maintenance of the cables.

3 Powering On and Powering Off the BTS3702E

When maintaining the BTS3702E, you need to power on and power off the BTS3702E. During power-on, check the power supply voltage of the BTS3702E and the states of the indicators on the BTS3702E. Power off the BTS3702E on a regular basis or in an emergency according to actual requirements.

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4 Replacing the BTS3702E Modules

The BTS3702E is an integrated outdoor micro BTS of Huawei WiMAX Micro. Replacing the BTS3702E modules disrupts all services carried by this BTS.

5 Replacing the Optical Modules

The optical module provides an interface for photoelectric conversion, which enables the transmission between the BTS3702E and other equipment through the optical fiber. It is used to connect the ASN-GW or cascading connections between the BTSs. Remove the optical fibers first when replacing the optical modules. This disrupts the transmission signal.

6 Replacing the Power Modules

The power module is used to shift the power level to enable the transmission between the BTS3702E and other equipment through Ethernet cables. It is used to connect the ASN-GW or cascading connections between the BTSs. Remove the Ethernet cables first when replacing the power modules. This disrupts the transmission signal .

7 Replacing the BTS3702E Cables

When the BTS3702E cables are faulty, you need to replace them promptly. The cables that can be replaced are power cables, signal cables, transmission cables, and RF jumpers.

Conventions

Symbol Conventions

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

Symbol

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Description

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

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DBS3900 WiMAX Site Maintenance Guide (Draft) Organization

Symbol Description

Indicates a hazard with a medium or low level of risk, which if not avoided, could result in minor or moderate injury.

Indicates a potentially hazardous situation, which if not avoided,could result in equipment damage, data loss, performance degradation, or unexpected results.

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

Provides additional information to emphasize or supplement important points of the main text.

General Conventions

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

Convention Description

Times New Roman Normal paragraphs are in Times New Roman.

Boldface Names of files, directories, folders, and users are in

boldface. For example, log in as user root.

Italic Book titles are in italics.

Courier New

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

Command Conventions

The command conventions that may be found in this document are defined as follows.

Convention Description

Boldface The keywords of a command line are in boldface.

Italic Command arguments are in italics.

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

{ x | y | ... } Optional items are grouped in braces and separated by

vertical bars. One item is selected.

[ x | y | ... ] Optional items are grouped in brackets and separated by

vertical bars. One item is selected or no item is selected.

{ x | y | ... }

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

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Organization

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Convention Description

[ x | y | ... ]

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

GUI Conventions

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

Convention Description

Boldface Buttons, menus, parameters, tabs, window, and dialog titles

are in boldface. For example, click OK.

> Multi-level menus are in boldface and separated by the ">"

signs. For example, choose File > Create > Folder.

Keyboard Operations

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

Format Description

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

Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt

+A means the three keys should be pressed concurrently.

Key 1, Key 2 Press the keys in turn. For example, pressing Alt, A means

the two keys should be pressed in turn.

Mouse Operations

The mouse operations that may be found in this document are defined as follows.

Action Description

Click Select and release the primary mouse button without moving

the pointer.

Double-click Press the primary mouse button twice continuously and

quickly without moving the pointer.

Drag Press and hold the primary mouse button and move the

pointer to a certain position.

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DBS3900 WiMAX Site Maintenance Guide (Draft) 1 Preparations for Site Maintenance

1 Preparations for Site Maintenance

The preparations for the maintenance of the BTS3702E site include obtaining site information, selecting maintenance tasks, and preparing maintenance tools and spare parts.

Obtaining the Site Information

Before maintaining the BTS3702E site, familiarize yourself with the following information about the BTS:

l Unsolved faults and alarms of the site

l Hardware configuration of the site

l Local environment

l Spare parts

Selecting Maintenance Items

According to the specific condition of the BTS3702E site, you should select proper maintenance tasks, including:

l Maintaining the power supply system and grounding system of the BTS3702E

l Maintaining the BTS3702E main equipment

l Maintaining the cables of the BTS3702E

Arranging for Tools and Spare Parts

Choose the corresponding tools and spare parts according to the site information and maintenance tasks of the BTS3702E.

The site maintenance tools are:

l The frequency test devices include a signal generator, a spectrum analyzer, and

corresponding connectors and cables.

l The power test devices are used to test and analyze the output power of the BTS3702E.

The power meter is often used.

l The antenna and feeder test equipment is used to locate faults and to measure the standing

wave ratio, return loss, and cable insertion loss. The SiteMaster is often used.

l Other materials

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1 Preparations for Site Maintenance

– Other tools and materials are the multimeter, ESD wrist strap or gloves, screwdriver,

ESD box or bag, dust-free cloth, wrench, tape, diagonal plier, and plier.

– Ethernet cables for commissioning.

– Local maintenance terminal.

– Spare parts.

NOTE

Arrange for the tools and components according to the actual conditions of the specific replacement.

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DBS3900 WiMAX Site Maintenance Guide (Draft) 2 Tasks of Routine Hardware Maintenance

2 Tasks of Routine Hardware Maintenance

About This Chapter

2.1 Maintenance of Power Supply System and Grounding System of the BTS3702E

This section describes the maintenance tasks, maintenance frequency, operation guidance, and reference standard of the power supply system and grounding system of the BTS3702E.

2.2 Maintenance of BTS3702E Main Equipment

The maintenance tasks of the BTS3702E equipment include checking the surface of the equipment, cleanness of the equipment, and indicators.

2.3 Maintenance of Cables

The maintenance tasks of cables include checking the signal cables, the Ethernet cables, the optical fibers, the connectors, and the sockets.

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DBS3900 WiMAX

2 Tasks of Routine Hardware Maintenance

Site Maintenance Guide (Draft)

2.1 Maintenance of Power Supply System and Grounding System of the BTS3702E

This section describes the maintenance tasks, maintenance frequency, operation guidance, and reference standard of the power supply system and grounding system of the BTS3702E.

Table 2-1 lists the maintenance tasks of the power system and grounding system of the

BTS3702E.

Table 2-1 Maintenance tasks for the power supply system and grounding system of the BTS3702E

Item Frequency Operation Standard

Power cable Monthly Carefully check the

connections of power cables.

Voltage Monthly Measure the voltage

of the power supply using a multimeter.

PGND cable Monthly Check whether the

PGND cable and ground bar are connected securely.

Earth resistance Monthly Measure the earth

resistance using an electric earth resistance tester and record the measurement.

2.2 Maintenance of BTS3702E Main Equipment

The power cables are not aging, and there is no corrosion on the joints.

Operating voltage range: -36 V DC to

-57 V DC.

The joints are secure and corrosion free.

The grounding resistance is lower than 10 ohms.

The maintenance tasks of the BTS3702E equipment include checking the surface of the equipment, cleanness of the equipment, and indicators.

Table 2-2 lists the maintenance tasks of the BTS3702E.

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DBS3900 WiMAX Site Maintenance Guide (Draft) 2 Tasks of Routine Hardware Maintenance

Table 2-2 Maintenance tasks of the BTS3702E

Item Frequency Operation Standard

Equipment surface Quarterly Check whether the

Equipment

Quarterly Check whether the

cleanliness

Indicators Monthly Check whether the

2.3 Maintenance of Cables

The maintenance tasks of cables include checking the signal cables, the Ethernet cables, the optical fibers, the connectors, and the sockets.

surface of the equipment is damaged and whether the label of the equipment is legible.

equipment is clean.

indicators on the equipment are functional.

For details on the meanings of the indicators, see 3.1

Powering On the BTS3702E.

Table 2-3 lists the maintenance items for the cables.

Table 2-3 Maintenance items for cables

Item

Frequency Operation Standard

Carefully check the

Signal cables Annually

connection of the signal cables.

Carefully check the

Ethernet cables Annually

connection of the Ethernet cables.

l The signal cables are

reliably connected.

l The signal cables are

intact.

l The cables can be clearly

identified through the labels.

l The Ethernet cables are

reliably connected.

l The Ethernet cables are

intact.

l The hubs are intact.

l The cables can be clearly

identified through the labels.

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2 Tasks of Routine Hardware Maintenance

Item Frequency Operation Standard

Optical fibers Annually

RF jumper Annually

Check the connections of the optical fibers and optical modules.

Carefully check the connection of the RF jumper.

DBS3900 WiMAX

Site Maintenance Guide (Draft)

l The optical fibers are

intact and reliably connected.

l The optical modules are

clean and connected properly.

l The winding pipes for

the optical fiber are intact.

l The cables can be clearly

identified through the labels.

l The RF jumpers are

intact and reliably connected.

l The waterproof of the RF

jumper connections is perfect.

l The cables can be clearly

identified through the labels.

Connectors and sockets

Quarterly

Check whether there is any dust or greasy dirt on the insulators of the connectors and sockets.

The insulators are clean.

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DBS3900 WiMAX Site Maintenance Guide (Draft) 3 Powering On and Powering Off the BTS3702E

3 Powering On and Powering Off the

BTS3702E

About This Chapter

3.1 Powering On the BTS3702E

The power supply input of the BTS3702E is -48 V DC. After powering on the BTS3702E, determine the working state of the BTS3702E according to the status of the indicators.

3.2 Powering Off the BTS3702E

You can power off the BTS3702E in a normal situation or in an emergency.

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3 Powering On and Powering Off the BTS3702E

3.1 Powering On the BTS3702E

The power supply input of the BTS3702E is -48 V DC. After powering on the BTS3702E, determine the working state of the BTS3702E according to the status of the indicators.

Prerequisite

l The installation of the hardware and cables of the BTS3702E is finished.

l The range of the power supply input of the BTS3702E is from -36 V DC to -57 V DC.

Context

CAUTION

The BTS3702E must be powered on within 24 hours after being unpacked or after being powered off for maintenance.

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Procedure

Step 1 Turn on the power switch of the BTS3702E.

Step 2 Wait for three to five minutes and then check the status of the indicators on modules of the

DANGER

After the BTS3702E is powered on, do not look directly at the beam from the optical module without taking the necessary eye-protection measures.

BTS3702E. Table 3-1 lists the meanings of the indicators.

Table 3-1 Meanings of the BTS3702E indicators

Indicator Color State Description

RUN Green On There is power input, but the

board is faulty.

Off There is no power input, or the

board is faulty.

Blinking at 4 Hz (on for

0.125s and off for 0.125s)

Blinking at 0.5 Hz (on for 1s and off for 1s)

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The board is being loaded.

The board is working properly.

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DBS3900 WiMAX Site Maintenance Guide (Draft) 3 Powering On and Powering Off the BTS3702E

Indicator Color State Description

ALM Red On An alarm is generated, and the

board needs to be replaced.

Blinking at 0.5 Hz (on for 1s and off for 1s)

An alarm is generated, but you cannot determine that the board needs to be replaced. This alarm may be generated by a faulty board or port.

Off No fault.

TX_ACT Green On The board is working

properly.

Blinking at 0.5 Hz (on for 1s and off for 1s)

The board is operating, but the antenna port transmits no power.

SFP0 Red and green Green and on The link is functional.

Green and blinking Data can be transmitted and

received over the Ethernet port.

Red and on An alarm is generated,

indicating that an exception occurs when the optical module receives signals.

Off The SFP module is not in

position or is powered off.

SFP1 Red and green Green and on The link connected to the

Ethernet port is functional.

Green and blinking Data can be transmitted and

received over the Ethernet port.

Red and on An alarm is generated,

indicating that exception occurs when the optical module receives signals.

Off The SFP module is not in

position or is powered off.

VSWR Red Off No alarm is generated.

On An alarm is generated on only

the A port of the antenna subsystem.

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Indicator Color State Description

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Blinking at 4 Hz (on for

0.125s and off for 0.125s)

Blinking at 0.5 Hz (on for 1s and off for 1s)

Step 3 Proceed with the next step according to the status of the indicator.

If... Then...

The modules of the BTS3702E work properly.

The BTS3702E is faulty. Record the faulty status, turn off the power

----End

The power-on procedure is complete.

switch, rectify the fault, and then go to Step

An alarm is generated on both the A and B ports of the antenna subsystem.

An alarm is generated on only the B port of the antenna subsystem.

3.2 Powering Off the BTS3702E

You can power off the BTS3702E in a normal situation or in an emergency.

Procedure

Step 1 Determine the method for powering off the BTS3702E according to the actual situation.

If... Then...

The BTS3702E needs to be powered off when you swap the equipment or anticipate a territorial power outage.

The BTS3702E needs to be powered off in an emergency, such as fire, smoke, or water immersion,

Step 2 Set the circuit breaker on the auxiliary power supply equipment of the BTS3702E to OFF.

Step 3 Cut off the external input power supply for the auxiliary power supply equipment of the

BTS3702E. If time permits, ensure that the circuit breaker on the auxiliary power supply equipment of the BTS3702E is set to OFF.

Power off the BTS3702E in a normal situation by referring to Step 2.

Power off the BTS3702E in an emergency by referring to Step 3.

----End

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DBS3900 WiMAX Site Maintenance Guide (Draft) 4 Replacing the BTS3702E Modules

4 Replacing the BTS3702E Modules

The BTS3702E is an integrated outdoor micro BTS of Huawei WiMAX Micro. Replacing the BTS3702E modules disrupts all services carried by this BTS.

Prerequisite

Context

Procedure

l Check the quantity and model of the replaced BTS3702E modules. Prepare the new

BTS3702E modules.

l Record the installation position of the BTS3702E modules.

l Record the port positions of all the cables connected to the BTS3702E modules.

l Prepare the tool kit.

CAUTION

Take proper ESD prevention measures, for example, wear ESD wrist straps or gloves to prevent boards, modules, and electronic components from being destroyed by static discharge from the human body.

NOTE

See the BTS3702E Quick Installation Guide to install new BTS3702E modules.

Step 1 Upload the BTS data configuration file by referring to Manually Backing Up Configuration

Data.

Step 2 Power off the BTS3702E and turn off the power switch of the external power supply of the

BTS3702E by referring to 3.2 Powering Off the BTS3702E.

Step 3 Open the cover of the cabling cavity to disconnect all the cables connected to the BTS3702E

modules and take insulation measures for the cables.

Step 4 Move the faulty BTS3702E modules and replace them by new BTS3702E modules.

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4 Replacing the BTS3702E Modules

Step 5 Connect all the cables to the new BTS3702E modules and fix the cover of the cabling cavity.

Step 6 Turn on the power switch of the external power supply of the BTS3702E and power on the

BTS3702E by referring to 3.1 Powering On the BTS3702E.

Step 7 Replace the ESN number of the BTS by referring to Detecting BSs Automatically.

----End

Later Measures

Check the following items after replacing the faulty BTS3702E modules:

l The BTS3702E modules are correctly installed.

l All the cables are correctly connected.

l The BTS3702E is operational after being powered on.

Contact the local Huawei office to handle the faulty BTS3702E modules.

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DBS3900 WiMAX Site Maintenance Guide (Draft) 5 Replacing the Optical Modules

5 Replacing the Optical Modules

Prerequisite

Context

l Check the quantity and type of the faulty optical modules and prepare new optical modules.

l Record the installation position and connection points of the faulty optical modules and the

optical fibers.

l The required tools and materials are ready. The tools or materials include the ESD wrist

strap or ESD gloves, and the ESD box or bag.

l The optical modules are hot-swappable.

l Replacing the BTS3702E optical module involves removing the optical fibers and faulty

optical modules, installing the new optical modules, connecting the optical fibers to the optical modules, and recovering the links. The operation takes about five minutes.

CAUTION

l Take proper ESD prevention measures, for example, wear ESD wrist straps or gloves to

prevent boards, modules, and electronic components from being destroyed by static discharge from the human body.

l After removing the optical fibers from the optical modules, do not look directly at the optical

modules and optical fiber connectors without taking the necessary eye-protection measures.

Procedure

Step 1 Press the latch on the connector of the optical fiber connector, and then remove the connector

from the faulty optical module.

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5 Replacing the Optical Modules

Step 2 Turn the ring-pull on the faulty optical module outwards. Hold the ring-pull and take the faulty

optical module out of the slot to remove it from the BTS3702E.

Step 3 Install the new optical modules in the BTS3702E.

Step 4 Connect the optical fiber connectors to the new optical modules.

Step 5 Check whether the transmission signal is recovered according to the indicators.

----End

Postrequisite

Contact the local Huawei office to handle the faulty optical modules.

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DBS3900 WiMAX Site Maintenance Guide (Draft) 6 Replacing the Power Modules

6 Replacing the Power Modules

Prerequisite

Context

l Check the quantity and type of the power modules. Prepare the new power modules.

l Record the installation position and connection points of the faulty power modules and the

Ethernet cables.

l The required tools or materials are ready. The tools or materials include the ESD wrist strap

or ESD gloves, and the ESD box or bag.

l The power modules are hot-swappable.

l Replacing the BTS3702E power module involves removing the Ethernet cables and faulty

power modules, installing the new power modules, connecting the Ethernet cables to the power modules, and recovering the links. The operation takes about five minutes.

CAUTION

l Take proper ESD prevention measures, for example, wear ESD wrist straps or gloves to

prevent boards, modules, and electronic components from being destroyed by static discharge from the human body.

Procedure

Step 1 Remove the Ethernet cables from the faulty power modules.

Step 2 Turn the ring-pull on the faulty power module outwards. Hold the ring-pull and take the faulty

power module out of the port to remove it from the BTS3702E.

Step 3 Install the new power modules in the BTS3702E.

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6 Replacing the Power Modules

Step 4 Connect the Ethernet cables to the new power modules.

Step 5 Check whether the transmission signal is recovered according to the indicators.

----End

Postrequisite

Contact the local Huawei office to handle the faulty power module.

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DBS3900 WiMAX Site Maintenance Guide (Draft) 7 Replacing the BTS3702E Cables

7 Replacing the BTS3702E Cables

About This Chapter

When the BTS3702E cables are faulty, you need to replace them promptly. The cables that can be replaced are power cables, signal cables, transmission cables, and RF jumpers.

Context

NOTE

Contact Huawei engineers in the following conditions:

l When you want to arrange for devices, cables, and connectors by yourself.

l When you need to shorten the cable with a specified length.

7.1 Replacing the Power Cables of the BTS3702E

When the power cables of the BTS3702E are faulty, you need to replace them.

7.2 Replacing the Signal Cables of the BTS3702E

When the signal cables of the BTS3702E are faulty, you need to replace them. The BTS3702E signal cables are monitoring signal cables.

7.3 Replacing the Transmission Cables of the BTS3702E

The transmission cables of the BTS3702E are optical fibers and Ethernet cables.

7.4 Replacing the RF Jumpers of the BTS3702E

The RF jumper of the BTS3702E is used to receive and transmit the RF signals. When the faulty RF jumper is confirmed, replace the faulty RF jumper.

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7 Replacing the BTS3702E Cables

Site Maintenance Guide (Draft)

7.1 Replacing the Power Cables of the BTS3702E

When the power cables of the BTS3702E are faulty, you need to replace them.

Prerequisite

l The type and model of the faulty power cables are confirmed, and the new power cables

are ready and routed according to the specifications.

l The new cables are in good condition.

l The required tools and materials are ready. The tools and materials are the ESD wrist strap

or gloves, Phillips screwdriver, flat-head screwdriver, ESD box or bag, and OT terminals.

Context

Replacing the power cables of the BTS3702E may interrupt all the services.

Replacing the power cables involves removing the faulty cables and installing the new cables. This operation takes about five minutes.

DBS3900 WiMAX

Procedure

Step 1 Route the new power cables in the same way as the faulty power cables are routed.

Step 2 For details about how to power off the BTS3702E, see 3.2 Powering Off the BTS3702E.

Step 3 Remove the faulty power cables from the equipment.

Step 4 Install the new power cables.

Step 5 Attach engineering labels to the new power cables and ensure that the content on each

Step 6 Bind the new power cables.

Step 7 For details about how to power on the BTS3702E, see 3.1 Powering On the BTS3702E.

CAUTION

Take proper ESD prevention measures, for example, wear ESD wrist straps or gloves to prevent boards, modules, and electronic components from being destroyed by static discharge from the human body.

engineering label is consistent with that on the original label.

----End

Later Measures

After replacing the faulty power cables, verify that:

The cables are correctly and securely connected.

Contact the local Huawei office to handle the faulty power cables.

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DBS3900 WiMAX Site Maintenance Guide (Draft) 7 Replacing the BTS3702E Cables

7.2 Replacing the Signal Cables of the BTS3702E

When the signal cables of the BTS3702E are faulty, you need to replace them. The BTS3702E signal cables are monitoring signal cables.

Prerequisite

l The types, models, and quantity of the faulty signal cables are confirmed, and the new

signal cables are ready.

l The new cables are in good condition.

l The required tools and materials are ready. The tools and materials are the ESD wrist strap

or ESD gloves, Phillips screwdriver, flat-head screwdriver, and ESD box or bag.

Context

Replacing the BTS3702E signal cables interrupts the signal transmission carried on the signal cables.

Procedure

Step 1 Lead the new signal cables to the peer device along the route of the faulty cables.

Step 2 Remove the faulty signal cables from the equipment.

Step 3 Connect two ends of new signal cables to the port connected to the faulty signal cables, and then

Step 4 Attach an engineering label to each new cable. The content on each engineering label should be

Replacing the signal cables involves removing the faulty cables, installing the new cables, clearing the alarms generated on the BTS3702E, and resuming the services. This operation takes about ten minutes.

CAUTION

Take proper ESD prevention measures, for example, wear ESD wrist straps or gloves to prevent boards, modules, and electronic components from being destroyed by static discharge from the human body.

remove the fault signal cables.

the same as that on the replaced cable.

Step 5 Bind the new signal cables.

----End

Later Measures

Check the following items after replacing the faulty signal cables:

l The cables are correctly and securely connected.

l All related alarms are cleared in the alarm management system.

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Contact the local Huawei office to handle the faulty signal cables.

Site Maintenance Guide (Draft)

7.3 Replacing the Transmission Cables of the BTS3702E

The transmission cables of the BTS3702E are optical fibers and Ethernet cables.

7.3.1 Replacing the Ethernet Cables

The Ethernet cables are used to transmit the electric signals between the BTS3702E and the ASN-GW, or transmit the electric signals between two cascading BTS3702Es. When the Ethernet cables of the BTS3702C are faulty, you need to replace them.

7.3.2 Replacing the Optical Fibers

The optical fibers are used to transmit the optical signals between the BTS3702E and the ASNGW, or transmit the optical signals between two cascading BTS3702Es. When the optical fibers of the BTS3702E are faulty, you need to replace them.

7.3.1 Replacing the Ethernet Cables

Prerequisite

Context

l The quantity and types of the faulty Ethernet cables are confirmed, and new Ethernet cables

are ready.

l The new cables are in good condition.

l The installation position of the Ethernet cable is recorded.

l The required tools and materials are ready. The tools and materials are the ESD wrist strap

or ESD gloves, and ESD box or bag.

Replacing the Ethernet cables between the BTS3702E and the ASN-GW interrupts all the services carried by the BTS3702E. Replacing the cascading Ethernet cable between two BTS3702Es interrupts all the BTS3702E services except the BTS3702E services between this Ethernet cable and the ASN-GW.

Replacing the Ethernet cables involves removing the faulty cables and installing the new cables. This operation takes about five minutes.

CAUTION

Take proper ESD prevention measures, for example, wear ESD wrist straps or gloves to prevent boards, modules, and electronic components from being destroyed by static discharge from the human body.

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DBS3900 WiMAX Site Maintenance Guide (Draft) 7 Replacing the BTS3702E Cables

Procedure

Step 1 Route the new Ethernet cables in the same way as the faulty Ethernet cables are routed.

Step 2 Remove the faulty Ethernet cables from the power modules. Remove the other connector from

the peer device.

Step 3 Install the new Ethernet cables.

Step 4 Attach an engineering label to each new cable. The content on each engineering label should be

the same as that on the replaced cable.

Step 5 Arrange and bind the new Ethernet cables.

----End

Later Measures

Check the following items after replacing the faulty Ethernet cables:

l The cables are correctly and securely connected.

l The related transmission alarms are cleared in the alarm management system.

Contact the local Huawei office to handle the faulty Ethernet cables.

7.3.2 Replacing the Optical Fibers

Prerequisite

l The quantity and type of the faulty optical fibers are confirmed, and new optical fibers are

ready.

l The new fibers are in good condition.

l The connections of optical fibers are recorded.

l The required tools and materials are ready. The tools and materials include the ESD wrist

strap or gloves, ESD box or bag, and dust free cloth.

Context

Replacing the optical fibers between the BTS3702E and the ASN-GW interrupts all the services carried by the BTS3702E. Replacing the cascading optical fiber between two BTS3702Es interrupts all the BTS3702E services except the BTS3702E services between this optical fiber and the ASN-GW.

Replacing the optical fibers involves removing the faulty optical fibers, installing the new optical fibers, clearing the related transmission alarms generated on the BTS3702E, and resuming the services. This operation takes about five minutes.

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CAUTION

l Take proper ESD prevention measures. For example, wear ESD wrist straps or gloves to

prevent boards, modules, and electronic components from being destroyed by static discharge from the human body.

l Protect your eyes against the laser emitted by the optical fiber that is removed from the optical

module.

Procedure

Step 1 Route the new optical fibers in the same way as the faulty optical fibers are routed.

Step 2 Press the latch on the LC connector of the faulty optical fiber, and then remove the LC connector

from the optical module. Remove the other connector from the peer device.

Step 3 Plug the LC connector of the new optical fiber into the same optical module according to the

label on the optical fiber. Install the other connector on the peer device.

DBS3900 WiMAX

Site Maintenance Guide (Draft)

Step 4 Attach an engineering label to each new optical fiber. The content on each engineering label

should be the same as that on the replaced fiber.

Step 5 Arrange and bind the new optical fibers.

----End

Later Measures

Check the following items after replacing the faulty optical fiber:

l The optical fiber of the correct type is properly connected.

l All related alarms are cleared in the alarm management system.

Contact the local Huawei office to handle the faulty optical fibers.

7.4 Replacing the RF Jumpers of the BTS3702E

The RF jumper of the BTS3702E is used to receive and transmit the RF signals. When the faulty RF jumper is confirmed, replace the faulty RF jumper.

Prerequisite

l Check the quantity and types of the faulty RF jumpers and prepare new RF jumpers.

l The required tools and materials are ready. The tools and materials include the ESD gloves,

screwdriver, waterproof tape, insulation tape, and feeder cable cutting tool.

Context

Before replacing the RF jumpers, you must power off the BTS3702E. This disrupts all the services carried by the sectors associated with the BTS3702E.

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DBS3900 WiMAX Site Maintenance Guide (Draft) 7 Replacing the BTS3702E Cables

CAUTION

Take proper ESD prevention measures. For example, wear ESD wrist straps or gloves to prevent boards, modules, and electronic components from being destroyed by static discharge from the human body.

NOTE

See the BTS3702E Quick Installation Guide to install new RF jumpers.

Procedure

Step 1 For details about how to power off the BTS3702E, see 3.2 Powering Off the BTS3702E.

Step 2 Remove the waterproof insulation tapes on the BTS3702E RF port and the antenna RF port.

Step 3 Remove the faulty RF jumpers from the BTS3702E RF ports.

Step 4 Remove the faulty RF jumpers from the RF ports on the antenna system.

Step 5 Fix the connector of the new RF jumpers to the corresponding RF ports on the BTS3701E.

Step 6 Wrap the joints of the BTS3702E RF ports with a layer of insulating tape. Wind the tape around

the joint from top down.

Step 7 Wrap the insulating tape with three layers of waterproof tape.

NOTE

The tape is wrapped in the following sequence: from top down, from bottom up, and then from top down. For every two adjacent tape layers, the tape on the upper layer overlaps about half the width of the tape on the lower layer.

Step 8 Wrap the waterproof tape with three layers of insulating tape. For details about how to wrap the

insulating tape, see Step 7.

Step 9 Connect the RF jumpers to the antenna system.

Step 10 Wrap the joint of the RF ports of the antenna system with the waterproof insulation tape.

Step 11 Stick the color rings. The new color rings should have the same color as the color rings on the

old RF jumpers.

Step 12 For details about how to power on the BTS3702E, see 3.1 Powering On the BTS3702E.

----End

Later Measures

Check the following items after replacing the faulty RF jumpers:

l The cables are correctly and securely connected.

l The BTS3702E is operational after being powered on.

Contact the local Huawei office to handle the faulty RF jumpers.

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