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Copyright Huawei Technologies Co., Ltd. 2011. All rights reserved.

No part of this document may be reproduced or transmitted in any form or by any means without prior written

consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions

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

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

Notice

The purchased products, services and features are stipulated by the contract made between Huawei and the

customer. All or part of the products, services and features described in this document may not be within the

purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,and recommendations in this document are provided "AS IS" without warranties, guarantees or representations

of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in the

preparation of this document to ensure accuracy of the contents, but all statements, information, and

recommendations in this document do not constitute the warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

Bantian, Longgang

Shenzhen 518129

People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

Issue 01 (2011-12-10) Huawei Proprietary and Confidential

Copyright Huawei Technologies Co., Ltd.

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About This Document

Purpose

After the BTS is deployed and accepted, the site starts the commercial operation. To ensure

smooth operation, you need to perform the routine maintenance on the BTS.

This document mainly describes the routine maintenance items of the BTS3012 hardware,

including the equipment room, cabinet, power supply system, grounding system, and antenna

system. This document also describes the procedures for replacing parts, modules, boards, and

cables.

Product Versions

The following table lists the product versions related to the document.

Product Name Product Version

BTS3012 V200R013

Intended Audience

This document is intended for:

l Technical support engineers

lMaintenance engineers

Organization

1 Changes in BTS3012 Site Maintenance Guide (for -48V/+24V)

This provides the changes in the BTS3012 Site Maintenance Guide (for -48V/+24V).

2 Preparations for Site Maintenance

This describes the preparations for site maintenance. The preparations for site maintenance are

obtaining site information, selecting maintenance items, and arranging maintenance tools andspare parts.

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3 BTS3012 Hardware Maintenance

This topic describes the BTS3012 hardware maintenance. The BTS3012 hardware maintenance

refers to the maintenance of the equipment room environment, cabinets, power supply,

grounding system, and antenna system of the BTS3012.

4 Powering On and Powering Off a BTS3012 Cabinet (-48 V/+24 V)

This describes how to power on and power off a BTS3012 cabinet (-48 V/+24 V). It is associated

with the power-on, normal power-off, and emergency power-off of the BTS3012 cabinet (-48

V/+24 V).

5 Installing the BTS3012 Boards and Modules (-48 V/+24 V) (Capacity Expansion)

This describes how to install the BTS3012 boards and modules for capacity expansion. The

capacity expansion involves the hardware installation on the BTS side and the data configuration

on the BSC side. After installing hardware on the BTS side, you must configure data on the LMT

on the BSC side. The boards and modules involved in the capacity expansion of the BTS3012

(-48 V/+24 V) are the DDPU, DCOM, DTRU, DFCU, DFCB, DELC, and PSU (DC) (+24 V)

6 Installing the Combined BTS3012 Cabinets and BTS3012Cabinet Groups (-48 V/+24 V)

(Capacity Expansion)

This describes how to install the combined BTS3012 cabinets and BTS3012 cabinet groups. The

BTS3012 supports the combination of two cabinets to form one group and the combination of

three cabinet groups. One cabinet supports 12 TRXs in full configuration. With three combined

groups, the S12/12/12 cell configuration can be achieved. The capacity expansion disrupts the

services carried by the BTS.

7 Replacing the BTS3012 Boards and Modules (-48 V/+24 V)

This describes how to replace the BTS3012 boards and modules (-48 V/+24 V). The BTS3012

boards that can be replaced are the DTMU, DCCU, DCSU, DATU, DEMU, DELC, DMLC, and

DSAC. The BTS3012 modules that can be replaced are DTRU, DDPU, DCOM, DFCU, DFCB,

and PSU (DC) (+24 V).

8 Cleaning the Parts of a BTS3012 Cabinet

This describes how to clean the parts of a BTS3012 cabinet. The parts of a BTS3012 cabinet

include the fan box and the air filter. The parts must be cleaned periodically.

9 Replacing the Parts of a BTS3012 Cabinet

This describes how to replace the parts of a BTS3012 cabinet. The parts of a BTS3012 cabinet

include the fan box, air filter, and busbar power switch.

10 Replacingthe Parts of the Antenna System

This describes how to replace the parts of the antenna system. The parts of the antenna system

are antennas, TMA, and feeders.

11 Replacing the BTS3012 Cables (-48 V/+24 V)

This describes how to replace the BTS3012 cables (-48 V/+24 V). BTS3012 cables (-48 V/+24

V) are E1 cables, optical cables, power cables (-48 V/+24 V), signal cables, and indoor 1/2-inch

jumpers.

Conventions

Symbol Conventions

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

Symbol Description

Indicates a hazard with a high level of risk, which if not

avoided, will result in death or serious injury.

Indicates a hazard with a medium or low level of risk, which

if not avoided, could result in minor or moderate injury.

Indicates a potentially hazardous situation, which if not

avoided, could result in equipment damage, data loss,

performance degradation, or unexpected results.

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

time.

Provides additional information to emphasize or supplement

important points of the main text.

General Conventions

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

Convention Description

Times New Roman Normal paragraphs are in Times New Roman.

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

boldface. For example, log in as user root.

Italic Book titles are in italics.

Courier New Examples of information displayed on the screen are in

Courier New.

Command Conventions

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


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.

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[ 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 byvertical bars. A minimum of one item or a maximum of all

items can be selected.

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

vertical bars. Several items or no item can be selected.

GUI Conventions

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


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

are in boldface. For example, click OK.

> Multi-level menus are in boldfaceand 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 Enterand press Tab.

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

+Ameans the three keys should be pressed concurrently.

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

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.

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Action Description

Drag Press and hold the primary mouse button and move the

pointer to a certain position.

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Contents

About This Document.....................................................................................................................ii

1 Changes in BTS3012 Site Maintenance Guide (for -48V/+24V)...........................................1

2 Preparations for Site Maintenance.............................................................................................2

3 BTS3012 Hardware Maintenance...............................................................................................4

4 Powering On and Powering Off a BTS3012 Cabinet (-48 V/+24 V).....................................9

4.1 Powering On the BTS3012 Cabinet (-48 V/+24 V).........................................................................................10

4.2 Powering Off a BTS3012 Cabinet (-48 V/+24 V)............................................................................................10

5 Installing the BTS3012 Boards and Modules (-48 V/+24 V) (Capacity Expansion)........12

5.1 Installing the BTS3012/BTS3012AE DDPU (Capacity Expansion)...............................................................14

5.2 Installing the BTS3012/BTS3012AE DCOM (Capacity Expansion)..............................................................16

5.3 Installing the BTS3012/BTS3012AE DTRU (Capacity Expansion)...............................................................19

5.4 Installing the BTS3012/BTS3012AE DFCU (Capacity Expansion)................................................................225.5 Installing the BTS3012/BTS3012AE DFCB (Capacity Expansion)................................................................24

5.6 Installing the BTS3012 DELC (Capacity Expansion)......................................................................................27

5.7 Installing the BTS3012 PSU (DC) (Capacity Expansion)................................................................................28

6 Installing the Combined BTS3012 Cabinets and BTS3012 Cabinet Groups (-48 V/+24 V)(Capacity Expansion).....................................................................................................................31

7 Replacing the BTS3012 Boards and Modules (-48 V/+24 V)................................................35

7.1 Replacingthe BTS3012/BTS3012AE Boards and Modules (Common Operations).......................................38

7.1.1 Preparations for Replacing BTS3012/BTS3012AE Boards and Modules..............................................38

7.1.2 Removing a Faulty BTS3012/BTS3012AE Board..................................................................................40

7.1.3 Installing a BTS3012/BTS3012AE Board..............................................................................................41

7.1.4 Checking the Installed BTS3012/BTS3012AE Board............................................................................43

7.1.5 Handling the Replaced BTS3012/BTS3012AE Board or Module..........................................................44

7.2 Replacing a BTS3012/BTS3012AE DTMU.......................................................................... ..........................45

7.3 Replacing a BTS3012/BTS3012AE DPTU......................................................................................................47

7.4 Replacing a BTS3012/BTS3012AE DABB.....................................................................................................49

7.5 Replacing a BTS3012/BTS3012AE DCCU.....................................................................................................50

7.6 Replacing a BTS3012/BTS3012AE DCSU.....................................................................................................52

7.7 Replacing a BTS3012/BTS3012AE DATU.....................................................................................................54

7.8 Replacing a BTS3012/BTS3012AE DTRU.....................................................................................................55

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7.9 Replacing a BTS3012/BTS3012AE DDPU.....................................................................................................57

7.10 Replacing a BTS3012/BTS3012AE DCOM..................................................................................................59

7.11 Replacing a BTS3012/BTS3012AE DFCU...................................................................................................60

7.12 Replacing a BTS3012/BTS3012AE DFCB....................................................................................................62

7.13 Replacing a BTS3012/BTS3012AE DEMU..................................................................................................64

7.14 Replacing a BTS3012/BTS3012AE DGPS....................................................................................................65

7.15 Replacing a BTS3012 DELC.........................................................................................................................66

7.16 Replacing a BTS3012 DMLC........................................................................................................................68

7.17 Replacing a BTS3012 DSAC.........................................................................................................................69

7.18 Replacing the BTS3012 PSU (DC)................................................................................................................71

8 Cleaning the Parts of a BTS3012 Cabinet................................................................................73

8.1 Cleaning the Fan Box.......................................................................................................................................74

8.2 Cleaning the Air Filter of a BTS3012 Cabinet.................................................................................................75

9 Replacing the Parts of a BTS3012 Cabinet..............................................................................78

9.1 Replacing the Fan Box of a BTS3012/BTS3012AE Cabinet...........................................................................79

9.2 Replacing the Air Filter of a BTS3012 Cabinet...............................................................................................80

9.3 Replacing the Busbar Power Switch of a BTS3012 Cabinet............................................................................81

10 Replacing the Parts of the Antenna System.........................................................................83

10.1 Replacing the BTS Antenna...........................................................................................................................84

10.2 Replacing the TMA........................................................................................................................................85

10.3 Replacing the Feeder......................................................................................................................................87

11 Replacing the BTS3012 Cables (-48 V/+24 V).......................................................................88

11.1 Replacing the BTS3012 E1 Cables................................................................................................................89

11.2 Replacing the BTS3012 Optical Cables.........................................................................................................90

11.3 Replacing the BTS3012 Power Cables (-48 V/+24 V)...................................................................................91

11.4 Replacing the BTS3012 Signal Cables...........................................................................................................93

11.5 Replacing the BTS3012 Indoor 1/2-Inch Jumpers.........................................................................................95

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1Changes in BTS3012 Site MaintenanceGuide (for -48V/+24V)

This provides the changes in the BTS3012 Site Maintenance Guide (for -48V/+24V).

01(2011-12-10)

This is the initial commercial release.

Compared with issue Draft A(2011-07-15), this issue does not include any changes.

Draft A(2011-07-15)

This is the draft A release.

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2Preparations for Site MaintenanceThis describes the preparations for site maintenance. The preparations for site maintenance are

obtaining site information, selecting maintenance items, and arranging maintenance tools and

spare parts.

Obtaining Site Information

Before maintaining a site, obtain the following information:

l Current faults and alarms

l Hardware configurations

l Software version

lTransmission and networking

l Timeslot consolidation equipment if any

l Local environment

l Spare parts

Selecting Maintenance Items

Based on actual conditions, select suitable maintenance items. The maintenance items are as

follows:

l Maintaining the room environment

l Maintaining a BTS cabinet

l Replacing BTS boards and modules

l Maintaining BTS power supply and grounding

l Maintaining the BTS antenna system

l Cleaning the fan box

l Clean the air filters

Arranging Tools and Spare Parts

Based on the site information and maintenance items, arrange the following maintenance toolsand spare parts:

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l Frequency test devices

The frequency test device consists of a frequency generator, a spectrum analyzer, and

various connectors and cables.

A frequency meter and a rubidium clock are usually used.

l Power test devices

The power test devices are used to measure and analyze the output power of a BTS. The

output power determines the effect of downlink coverage.

A power meter is usually used.

l Antenna and feeder test devices

The antenna and feeder test devices are used to measure the standing wave ratio, return

loss, and cable insertion loss, and to locate faults.

A SiteMaster is usually used.

l Other devices

Measuring tools: One 50 m ribbon tape, one 5 m measuring tape, and one 400 mm level bar

Marking pen

Drilling tools:

One percussion drill and a few matching bits

One cleaner

One power connector board (with three 2-phase sockets and three 3-phase sockets,

current capacity greater than 15 A)

Fastening tools

Three cross screwdrivers (4', 6', and 8' respectively) and three straight screwdrivers(4', 6', and 8' respectively)

Four adjustable wrenches (6', 8', 10', and 12' respectively), combination wrenches

(17' and 19' respectively), and one set of inner hexagon spanners.

One hex screwdriver (for BTS3012AE only, used for removing the anti-theft screws

on the rear door of the BTS3012AE cabinet)

Small tools

Sharp-nose pliers (8')

Pincer pliers (8')

Diagonal pliers (8')

NOTE

When some parts incur errors and need to be replaced, you need to arrange related tools and new

parts.

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3BTS3012 Hardware MaintenanceThis topic describes the BTS3012 hardware maintenance. The BTS3012 hardware maintenance

refers to the maintenance of the equipment room environment, cabinets, power supply,

grounding system, and antenna system of the BTS3012.

Maintaining the Equipment Room Environment

Table 3-1lists the maintenance of the BTS3012 equipment room environment.

Table 3-1Maintenance of the BTS3012 equipment room environment

MaintenanceItem

Interval Operation Guide Reference Standards

Checking

environmental

alarms

Every day Check whether power

supply alarms, fire alarms,

or smoke alarms are

reported.

NOTEThis maintenance item is

performed on the LMT. For

other maintenance items,

you need to perform them in

the equipment room.

No power supply alarms,

fire alarms, or smoke

alarms are reported.

Checking the

temperature in

the equipment

room

Each time site

maintenance is

performed

Record the temperature

read on the thermometer in

the equipment room.

-5C to 45C

Checking the

temperature in

the equipment

room

Each time site

maintenance is

performed

Record the humidity read

on the hygrometer in the

equipment room.

5%95% RH

Checking the

illumination in

the equipment

room

Every two

months

Check whether the routine

and emergency

illumination in the

equipment room is normal.

-

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MaintenanceItem


Checking

sockets

Every two

months

Check whether sockets are

normal.

-

Checking the air

conditioner

Every two

months

Check whether the air

conditioner works

properly.

-

Checking

protective

devices

Every two

months

Check whether anti-

disaster devices,

equipment protection

devices, and fire fighting

devices are in good

condition.

l There are portable and

qualified foam

extinguishers in the

equipment room.

l There is no danger of

damage to the

equipment by rats or

insects.

Cleaning the

equipment room

Every two

months

Check whether cabinets,

equipment housing,

equipment interior, tables,

floor, doors, and windows

are clean.

All the check items are

clean.

Maintaining the Cabinet

Table 3-2lists the maintenance of the BTS3012 cabinet.

Table 3-2Maintenance of the BTS3012 cabinet

MaintenanceItem


Checking the

fan box

Every week,

every month, or

every quarter

Check the fan box. No alarms related to the

fan box are reported.

Checking the

air filter

Every quarter If there is too much dust on

the air filter, clean the airfilter. For details, refer to

8.2 Cleaning the Air Filter

of a BTS3012 Cabinet.

-

Checking the

exterior of the

cabinet

Every month or

every quarter

Check whether there are

dents, cracks, holes, or

corrosion on the surface of

the cabinet and whether the

cabinet label is legible.

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MaintenanceItem


Checking the

lock and door

of the cabinet

Every month or

every quarter

Check whether the lock is

normal and the door can be

opened and closed easily.

-

Checking the

cleanliness of

the cabinet

Every month or

every quarter

Check whether the cabinet

is clean.

The cabinet surface is

clean. The subracks are

not dusty.

Checking the

cleanliness of

the fan box

Every year If there is too much dust on

the surface and inside of the

fan box, clean the fan box.

For details, refer to 8.1

Cleaning the Fan Box.

-

Checkingboard LEDs

Every month orevery quarter

Check whether the boardLEDs are normal.

For details about thestatus of indicators, refer

to the BTS3012 Hardware

Description.

Checking the

ESD wrist

strap

Every quarter Use either of the following

methods:

l Use an ESD wrist strap

tester to test the ESD

wrist strap.

l Use a multimeter to test

the grounding

resistance of the ESD

wrist strap.

If you use an ESD wrist

strap tester, the LED

GOOD is on.

If you use a multimeter,

the grounding resistance

is between 0.75 megohm

and 10 megohms.

Maintaining the Power Supply and Grounding System

Table 3-3lists the maintenance of the BTS3012 power supply and grounding system.

Table 3-3Maintenance of the BTS3012 power supply and grounding system

Maintenance Item Interval Operation Guide Reference Standards

Checking

power cables

Every month

or every

quarter

Check the connections of

power cables carefully.

The connections are

secure. The power cables

are in good condition and

the connection points are

not corroded.

Checking the

voltage

Every month

or every

quarter

Use a multimeter to measure

the voltage of the power

supply.

The voltage is within

standard range.

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Maintenance Item


Checking

PGND cables

Every month

or every

quarter

Check whether the

connections of PGND cables

and the grounding bar are

secure.

The connections are secure

and the connection points

are not corroded. The

PGND cables and the

grounding bar are in good

condition and corrosion

preventive.

Checking the

grounding

resistance

Every month

or every

quarter

Use an earth resistance meter

to measure the grounding

resistance and record it.

Conduct the test before the

rainy season.

The grounding resistance is

less than 10 ohms.

Checking thestorage

batteries

Every year Check the storage batteriesand rectifiers every year.

The battery capacity iswithin the normal range

and the batteries are

correctly connected. The

performance parameters of

rectifiers are normal.

Maintaining the Antenna System

Table 3-4lists the maintenance of the BTS3012 antenna system.

CAUTION

l The BTS antenna system requires periodic maintenance.

l You need to check all the antenna and feeder equipment after a storm of scale eight or

above, an earthquake, or other exceptional cases.

Table 3-4Maintenance of the BTS3012 antenna system

Maintenance Item


Checking the

tower

Every six

months

Check the conditions of the

tower, connections of

mechanical bolts, and the

anti-rust and anti-corrosion

conditions.

There is no damage to the

tower or sinking of the base,

the mechanical bolts are

properly connected, and the

tower is not rusted or

corroded.

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Maintenance Item


Checking the

pole

Every six

months

Check the installation of pole

fasteners, the stress

resistance of the staying

wires and anchors, and the

anti-corrosion and anti-rust

conditions of the pole.

The pole fasteners are

secure, the stress of the

staying wires and anchors is

balanced, and the pole is not

corroded or rusted.

Checking the

antenna

Every two

months

Check whether the antenna is

within the protection

coverage of the lightning rod

and whether the antenna

stand is securely installed on

the tower or the rooftop.

The antenna is within the

protection coverage of the

lightning rod (a deviation of

30 downward from the top

of the lightning rod). The

antenna stand is securely

installed on the tower or the

rooftop.

Checking the

feeder

Every two

months

Check whether the fixing

clips of the feeder are loose

and the feeder is flattened or

deformed.

The fixing clips of the feeder

are securely installed and the

feeder is in good condition.

There is no exposed copper

wire.

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4Powering On and Powering Off a BTS3012Cabinet (-48 V/+24 V)

About This Chapter

This describes how to power on and power off a BTS3012 cabinet (-48 V/+24 V). It is associated

with the power-on, normal power-off, and emergency power-off of the BTS3012 cabinet (-48

V/+24 V).

4.1 PoweringOn the BTS3012 Cabinet (-48 V/+24 V)

This describes how to power on the BTS3012 cabinet (-48 V/+24 V). Before powering on the

BTS3012 cabinet (-48 V/+24 V), ensure that the power cables are properly installed in thecabinet. The input power ranges from 40 V DC to 60 V DC, or from +21 V DC to +29 V DC.

Set all the switches on the busbar in the cabinet to OFF.

4.2 PoweringOff a BTS3012 Cabinet (-48 V/+24 V)

This describes how to power off a BTS3012 cabinet. The power-off of a BTS3012 cabinet (-48

V/+24 V) is of two types: normal power-off and emergency power-off. In special cases, such as

an equipment swap and a foreseeable regional power cut, the normal power-off of the equipment

is required. In the cases when a fire, smog, or water immersion occurs, emergency power-off of

the equipment is required. The power-off operation disrupts all the services carried on the BTS.

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WARNING

For the cabinet using +24 V power supply, set the power control switch on the PSU

(DC) to OFF before cutting off the external power supply.

l Perform the emergency power-off.

1. Cut off the external power supply.

2. Set all the power switches on the busbar to OFF if time allows.

----End

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5Installingthe BTS3012 Boards and Modules(-48 V/+24 V) (Capacity Expansion)

About This Chapter

This describes how to install the BTS3012 boards and modules for capacity expansion. The

capacity expansion involves the hardware installation on the BTS side and the data configuration

on the BSC side. After installing hardware on the BTS side, you must configure data on the LMT

on the BSC side. The boards and modules involved in the capacity expansion of the BTS3012

(-48 V/+24 V) are the DDPU, DCOM, DTRU, DFCU, DFCB, DELC, and PSU (DC) (+24 V)

5.1 Installingthe BTS3012/BTS3012AE DDPU (Capacity Expansion)This describes how to install the BTS3012/BTS3012AE DDPU. The DDPU is placed in the

DAFU subrack. If the cells or the TRXs in the BTS require capacity expansion, you need to add

DDPUs. Adding DDPUs disrupts cell services.

5.2 Installing the BTS3012/BTS3012AE DCOM (Capacity Expansion)

This describes how to install the BTS3012/BTS3012AE DCOM. The DCOM is installed in the

DAFU subrack. If the cells in the BTS require capacity expansion or there are more than four

TRXs in a cell, you may need to add DCOMs. Adding DCOMs disrupts the cell services.

5.3 Installing the BTS3012/BTS3012AE DTRU (Capacity Expansion)

This describes how to install the BTS3012/BTS3012AE DTRU. The DTRU is installed in the

DTRU subrack. When TCHs are congested because the BTS traffic volume rises, or TRXs

require capacity expansion, you need to add DTRUs. Adding DTRUs disrupts the cell services.

5.4 Installing the BTS3012/BTS3012AE DFCU (Capacity Expansion)

This describes how to install the BTS3012/BTS3012AE DFCU. The Filter Combiner Unit for

DTRU BTS (DFCU) of the BTS3012/BTS3012AE is installed in the Antenna Front-end Unit

for DTRU BTS (DAFU). If the cells or the TRXs in the BTS require capacity expansion, you

may need to add DFCUs. Adding DFCUs disrupts the cell services.

5.5 Installing the BTS3012/BTS3012AE DFCB (Capacity Expansion)

This describes how to install the BTS3012/BTS3012AE DFCB. The Filter Combiner Unit for

DTRU BTS type B (DFCB) of the BTS3012/BTS3012AE is installed in the Antenna Front-end

Unit for DTRU BTS (DAFU) subrack. If the cells or the TRXs in the BTS require capacity

expansion, you may need to add DFCBs. Adding DFCBs disrupts the cell services.

5.6 Installing the BTS3012 DELC (Capacity Expansion)

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This describes how to install the BTS3012 DELC. The E1 signal Lightning-protection Card for

DTRU BTS (DELC) of the BTS3012 cabinet is installed in the signal lightning protection

subrack on the top of the cabinet. When the BTS requires TRX capacity expansion (that is, the

number of TRXs exceeds the capacity of the four E1 cables for the DELC), or when the onsite

BTS networking uses multi-BTS tree topology, you need to add DELCs. Adding DELCs disrupts

the services carried on the BTS.

5.7 Installing the BTS3012 PSU (DC) (Capacity Expansion)

This describes how to install the PSUs of the BTS3012. The PSUs are placed in the power

subrack. When the capacity of the main cabinet is expanded and its load increases, you need to

add PSUs if the number of existing PSUs cannot meet requirements. You also need to add PSUs

during capacity expansion of the batteries. Adding PSUs does not affect the services of the BTS.

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5.1 Installing the BTS3012/BTS3012AE DDPU (CapacityExpansion)

This describes how to install the BTS3012/BTS3012AE DDPU. The DDPU is placed in the

DAFU subrack. If the cells or the TRXs in the BTS require capacity expansion, you need to add

DDPUs. Adding DDPUs disrupts cell services.

Prerequisites

l You have obtained the status of the board or the module and the information about the

corresponding slot.

l You have confirmed the types and number of the required boards or modules as well as the

subrack and slots where the boards or modules are located.

l The hardware versions of new boards or modules are correct.

l If the boards or modules have DIP switches on them, ensure that the settings of the DIP

switches are correct.

l You have arranged the key to the front cabinet door and other required tools, such as a #2

cross screwdriver, cable straps, and labels.

l The required material has been delivered on site.

Context

The entire capacity expansion takes about 20 minutes.

Handle the DDPU carefully because it is heavy.

CAUTION

Take correct ESD prevention measures, such as wearing an ESD wrist strap or ESD gloves, to

avoid static damage to boards, modules, and electronic components.

CAUTION

After the operation, remove the ESD wrist strap, arrange its line, and place it on the zig strap of

the air filter inside the door of the cabinet. Confirm that the cables and parts are in position. The

ESD wrist strap must not be connected to the ESD jack when you close the door. Otherwise, the

door will get stuck by the ESD wrist strap and the ESD wrist strap or the cabinet door will be

damaged.

Procedure

Step 1 Block all the DTRUs in the cabinet by referring to Change the management status of the BTS.Block the related DTRUs.

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Step 2 Power off the DAFU subrack.

If... Then...

Power-off is performed on the BTS3012 Set the DAFU MCB on the busbar to OFF.

Power-off is performed on the BTS3012AE Set the DAFU MCB on the DC power

distribution box to OFF.

Step 3 Install a new DDPU by referring to Installing a New DDPU.

WARNING

The screws on the DDPU must be secure to ensure the current discharging function of the DDPU.

If the screws are not secure, the DDPU cannot fully perform the lightning protection function.

Therefore, the equipment cannot work reliably.

Step 4 Install the cables on the new DDPU panel.

1. Install the power cable.

a. Remove the dustproof caps of the power cables for DDPUs.

b. Connect the power cables to the POWER ports on the panels of DDPUs.

c. Tighten the two fastening bolts on each cable connector.

d. Place the removed protective caps at the bottom of the cabinet for future use.

2. Install the RF cables.

Install RF cables according to the BTS configurations. The installation procedure consists

of Installing RF Signal Cables and Installing Indoor 1/2-inch Jumpers.

Step 5 Attach the cell label to the panel of the new DDPU.

Step 6 Power on the DAFU subrack.

If... Then...

Power-on is performed on the BTS3012 Set the DAFU MCB on the busbar to ON.

Power-on is performed on the BTS3012AE Set the DAFU MCB on the DC power

distribution box to ON.

NOTE

After the hardware installation is complete, verify the following items:

l The modules are securely inserted.

l The status of the LEDs on the modules is normal.

Step 7 Configure BTS data on the LMT and place the new DDPU module in a proper slot of the BTS.

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NOTE

The BTS data must match the actual BTS configuration on site. Huawei recommends that this step be performed

under the instruction of the head responsible person on the BTS side and on the BSC side.

1. Logging In to the LMT.

2. Enter the ADD BTSANTFEEDERBRDcommand in the Command Inputbox, and thenclick Assist.

3. Select DDPM_DDPU(DDPM_DDPU) from the Board Typedrop-down list box and set

other parameters according to the actual situation on site. Then, click Execto add the board.

4. Enter the SET BTSANTFEEDERCONNECTcommand in the Command Inputbox,

and then click Assist.

5. Select DDPM_DDPU(DDPM_DDPU) from the Board Typedrop-down list box and set

other parameters according to the actual situation on site. Then, click Execto configure the

connection of the BTS antenna.

6. Enter the MOD BTSANTFEEDERBRDcommand in the Command Inputbox, and then

click Assist.7. Select DDPM_DDPU(DDPM_DDPU) from the Board Typedrop-down list box and set

other parameters according to the actual situation on site. Then, click Execto modify the

frequency band attributes for the BTS antenna board to complete the configuration of the

DDPU.

Step 8 Querying BTS Board Information. If the software version does not match the current BTSversion, load and activate the software of the new DDPU module by referring to Software

Loading and Software Activation

Step 9 Select the BTS from the navigation tree in the left pane of the BSC6900 Device Maintenancewindow. Then, confirm the data configuration of the new module on the BTS Device Paneltab

page.

Step 10 Unblock all the DTRUs in the cabinet by referring to Change the management status of the BTS.

----End

Follow-up Procedure

After capacity expansion, verify the following items:

1. The module alarms are cleared.

2. The modules run properly.

5.2 Installing the BTS3012/BTS3012AE DCOM (CapacityExpansion)

This describes how to install the BTS3012/BTS3012AE DCOM. The DCOM is installed in the

DAFU subrack. If the cells in the BTS require capacity expansion or there are more than four

TRXs in a cell, you may need to add DCOMs. Adding DCOMs disrupts the cell services.

Prerequisites

l

You have obtained the status of the board or the module and the information about thecorresponding slot.

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NOTE

The information about traffic statistics for the analysis of the related parameters after capacity expansion are

collected.

Context


CAUTION



CAUTION





damaged.

Procedure

Step 1 Change the management status of the BTS. Block all the DTRUs in the cabinet.


If... Then...

Power-off is performed on the BTS3012 Set the DAFU MCB on the power busbar to

OFF.



Step 3 Install new DCOMs.

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Step 4 Install cables to the panels of the new DCOMs.

Install RF cables and signal cables according to the BTS configurations. The installation consists

of installing RF transmit signal cables and installing the signal cable between the DCTB and the

DAFU.


If... Then...

Power-on is performed on the BTS3012 Set the DAFU MCB on the power busbar to

ON.



NOTE




Step 6 Configure the BTS data on the LMT. Configure the DCOM in the corresponding slot of the BTS.

NOTE




2. Enter the ADD BTSBRDcommand in the Command Inputbox, and then click Assist.

3. Select DCBM_DCOMfrom the Board Typedrop-down list box and set other parameters

according to the actual situation on site. Then, click Execto add the board.


page.

Step 8 Change the management status of the BTS. Unblock all the DTRUs in the cabinet.

----End

Follow-up Procedure

After the capacity expansion, verify the following:



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5.3 Installing the BTS3012/BTS3012AE DTRU (CapacityExpansion)

This describes how to install the BTS3012/BTS3012AE DTRU. The DTRU is installed in the

DTRU subrack. When TCHs are congested because the BTS traffic volume rises, or TRXs

require capacity expansion, you need to add DTRUs. Adding DTRUs disrupts the cell services.

Prerequisites


corresponding slot.









Context


CAUTION



CAUTION





damaged.

Procedure

Step 1 Switch off the related DTRUs.

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If... Then...

Power-off is performed on the BTS3012 Set the TRX MCB on the power busbar to

OFF.

Power-off is performed on the BTS3012AE Set the DTRU MCB on the DC power


Step 2 Install new DTRUs.

Step 3 Install cables to the panels of the new DTRUs.

1. Install power cables.

a. Remove the protective caps of the power cables for DTRUs.

b. Install the power cables to the POWER ports on the panels of DTRUs.c. Screw the two fastening bolts on each cable connector.


2. Install RF cables and signal cables.

Install RF cables and signal cables according to the BTS configurations. The installation

consists of installing RF RX signal cables and installing the cables for combiners on

DTRUs.

Step 4 Switch on the DTRUs.

If... Then...

Power-on is performed on the BTS3012 Set the TRX MCB on the power busbar to ON.

Power-on is performed on the BTS3012AE Set the DTRU MCB on the DC power


NOTE




Step 5 Configure data on the LMT. Configure DTRUs in the related slots by adding TRXs.


2. Enter the ADD BTSTRXBRDcommand in the Command Inputbox, and then click

Assist.

3. Select TRU(TRU/DTRU)from the Board Typedrop-down list box and set other

parameters according to the actual situation on site. Then, click Execto add the board.

4. Enter the ADD GCELLcommand in the Command Inputbox, and then click Assist. Set

the parameters according to the actual situation on site. Then, click Execto add the cell.

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5. Enter the ADD GCELLFREQcommand in the Command Inputbox, and then click

Assist. Set the parameters according to the actual situation on site. Then, click Execto add

frequencies for the cell.

6. Enter the ADD GCELLOSPMAPcommand in the Command Inputbox, and then click

Assist. Set the parameters according to the actual situation on site. Then, click Execto addthe signaling point mapping relation for the cell.

7. Enter the ADD CELLBIND2BTScommand in the Command Inputbox, and then click

Assist. Set the parameters according to the actual situation on site. Then, click Execto bind

the cell to the BTS.

8. Enter the ADD GTRXcommand in the Command Inputbox, and then click Assist. Set

the parameters according to the actual situation on site. Then, click Execto add the TRX.

9. Enter the ADD TRXBIND2PHYBRDcommand in the Command Inputbox, and then

click Assist. Set the parameters according to the actual situation on site. Then, click

Execto bind the logical TRX to the pass on the TRX board to complete the configuration

of the DTRU.

10. Select the BTS from the navigation tree in the left pane of the BSC6900 DeviceMaintenancewindow. Then, confirm the data configuration of the new module on the

BTS Device Paneltab page.

11. Ensure that the number of added TRUs displayed equals the number of added TRXs.

12. Confirm that the new TRXs are configured in the antenna attributes of the corresponding

module in the DAFU subrack. If the new TRX is not configured, configure the new TRX

in the antenna attributes by referring to Table 5-1.

Table 5-1TRX configuration (in the DAFU subrack)

Module Type Configuration References

DDPU See Antenna feeder property configuration for the

DDPU.

DFCU See Antenna feeder property configuration for the

DFCU.

DFCB See Antenna feeder property configuration for the

DFCB.

Step 6 Query the information of the BTS boards. If the software version does not match the current

BTS version, perform software loading and software activation for the new DTRUs.

----End

Follow-up Procedure




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5.4 Installing the BTS3012/BTS3012AE DFCU (CapacityExpansion)

This describes how to install the BTS3012/BTS3012AE DFCU. The Filter Combiner Unit for

DTRU BTS (DFCU) of the BTS3012/BTS3012AE is installed in the Antenna Front-end Unit

for DTRU BTS (DAFU). If the cells or the TRXs in the BTS require capacity expansion, you

may need to add DFCUs. Adding DFCUs disrupts the cell services.

Prerequisites


corresponding slot.


subrack and slots where the boards or modules are located.l The hardware versions of new boards or modules are correct.






Context


The DFCU is heavy. Handle the DFCU carefully.

CAUTION



CAUTION





damaged.

Procedure


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2. Enter the ADD BTSANTFEEDERBRDcommand in the Command Inputbox, and then

click Assist.

3. Select DFCU(DFCU)from the Board Typedrop-down list box and set other parameters


4. Enter the SET BTSANTFEEDERCONNECTcommand in the Command Inputbox,and then click Assist.


according to the actual situation on site. Then, click Execto configure the connection of

the BTS antenna.


click Assist.


according to the actual situation on site. Then, click Execto modify the frequency band

attributes for the BTS antenna to complete the configuration of the DFCU.

Step 8 Query the information of the BTS boards. If the software version does not match the currentBTS version, perform software loading and software activation for the new DFCUs.


page.


----End

Follow-up Procedure




5.5 Installing the BTS3012/BTS3012AE DFCB (CapacityExpansion)

This describes how to install the BTS3012/BTS3012AE DFCB. The Filter Combiner Unit for

DTRU BTS type B (DFCB) of the BTS3012/BTS3012AE is installed in the Antenna Front-end

Unit for DTRU BTS (DAFU) subrack. If the cells or the TRXs in the BTS require capacity

expansion, you may need to add DFCBs. Adding DFCBs disrupts the cell services.

Prerequisites


corresponding slot.




l

If the boards or modules have DIP switches on them, ensure that the settings of the DIPswitches are correct.

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Context


DFCBs are cascaded with DFCUs during the capacity expansion of the DFCU.

The DFCB is heavy. Handle it carefully.

CAUTION



CAUTION





damaged.

Procedure



If... Then...

Power-off is performed on the BTS3012 Set the DAFU MCB on the power busbar to

OFF.



Step 3 Install new DFCBs.

Step 4 Install cables to the panels of the new DFCBs.

1. Install power cables.

a. Remove the protective caps of the power cables for DFCBs.

b. Install the power cables to the POWER ports on the panels of DFCBs.

c. Screw the two fastening bolts on each cable connector.

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2. Install RF cables and signal cables.

Install RF cables and signal cables according to the BTS configurations. The installation

consists of installing BTS3012/BTS3012AE signal cables between the DFCB and theDFCU, installing RF TX signal cables, installing RF RX signal cables, installing power

detection cables, installing four-in-one short-circuiting cables, installing diversity receive

short-circuiting cables, and installing indoor 1/2-inch jumpers.

Step 5 Attach the cell labels to the panels of new DFCBs.


If... Then...

Power-on is performed on the BTS3012 Set the DAFU MCB on the power busbar to

ON.



NOTE




Step 7 Configure data on the LMT. Configuring DFCBs in the related slots.

NOTE




2. Enter the ADD BTSANTFEEDERBRDcommand in the Command Inputbox, and then

click Assist.

3. Select DFCB(DFCB)from the Board Typedrop-down list box and set other parameters


4. Enter the SET BTSANTFEEDERCONNECTcommand in the Command Inputbox,

and then click Assist.


according to the actual situation on site. Then, click Execto configure the connection of

the BTS antenna.


click Assist.


according to the actual situation on site. Then, click Execto modify the frequency band

attributes for the BTS antenna to complete the configuration of the DFCB.

Step 8 Query the information of the BTS boards. If the software version does not match the currentBTS version, perform software loading and software activation for the new DFCBs.

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page.


----End

Follow-up Procedure




5.6 Installing the BTS3012 DELC (Capacity Expansion)

This describes how to install the BTS3012 DELC. The E1 signal Lightning-protection Card for

DTRU BTS (DELC) of the BTS3012 cabinet is installed in the signal lightning protection

subrack on the top of the cabinet. When the BTS requires TRX capacity expansion (that is, the

number of TRXs exceeds the capacity of the four E1 cables for the DELC), or when the onsite

BTS networking uses multi-BTS tree topology, you need to add DELCs. Adding DELCs disrupts

the services carried on the BTS.

Prerequisites


corresponding slot.

l You have confirmed the types and number of the required boards or modules as well as thesubrack and slots where the boards or modules are located.







Context

It takes about 10 minutes for the entire capacity expansion.

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CAUTION

l If you may touch the cabinet (including boards, modules, cables, and components in the

cabinet) in an operation, wear an ESD wrist strap and correctly ground it.l When installing boards, do not touch PCBs or components except jumpers and DIP switches.

l Because the captive screws on the boards in the common subrack are M3 screws, use a #2

cross screwdriver (diameter: 6 mm) when loosen or tighten the screws. If you do not know

the type of the cross screwdriver, try different cross screwdrivers starting from the one with

the greatest diameter until you find a suitable one. Do not use the screwdriver smaller than

the #2 cross screwdriver.

CAUTION





damaged.

Procedure

Step 1 Install new DELCs.

Step 2 Install E1 cables.

NOTE

If you add a site in cascading mode (cascading through E1s of the DELC), you need to configure the port

relation between the new site and its upper-level site.

----End

Follow-up Procedure


1. E1 cables are properly installed.

2. The grounding status of the E1 cables is correct.

3. The E1-related alarms on the Site Maintenance Terminal System are cleared.

5.7 Installing the BTS3012 PSU (DC) (Capacity Expansion)

This describes how to install the PSUs of the BTS3012. The PSUs are placed in the power

subrack. When the capacity of the main cabinet is expanded and its load increases, you need to

add PSUs if the number of existing PSUs cannot meet requirements. You also need to add PSUs

during capacity expansion of the batteries. Adding PSUs does not affect the services of the BTS.

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Prerequisites


corresponding slot.









Context

The capacity expansion takes about 10 minutes.

The PSU applies only to the cabinet using +24 V power supply.

CAUTION



CAUTION





damaged.

Procedure

Step 1 Install a new PSU.

Step 2 Repeat the above steps until all the PSUs (in order of PSU 0, PSU 1, PSU 2, and PSU 3) areinstalled.

Step 3 Configure the BTS data on the LMT. Configure the PSU in the corresponding slot of the DEMUin the BTS.

Step 4 Ensure that the data configuration for the new module is correct.

----End

Follow-up Procedure

After the capacity expansion, verify the following items:

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1. The PSUs are powered on.

2. The status of the PSU LEDs is normal.

3. The BTS services are normal and no related alarm is generated.

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6Installing the Combined BTS3012 Cabinetsand BTS3012 Cabinet Groups (-48 V/+24 V)


This describes how to install the combined BTS3012 cabinets and BTS3012 cabinet groups. The

BTS3012 supports the combination of two cabinets to form one group and the combination of

three cabinet groups. One cabinet supports 12 TRXs in full configuration. With three combined

groups, the S12/12/12 cell configuration can be achieved. The capacity expansion disrupts the

services carried by the BTS.

Prerequisites

l

You have obtained the status of the board or the module and the information about thecorresponding slot.









NOTE

l If you need to add a BTS, ensure that there are idle ports on the GEIUB or GOIUB on the BSC side.

l For combined cabinets and cabinet groups, you need to remove the lightning protection failure alarm

cables on the top of the cabinet and replace the short cables with long cables. A 35 mm straight

screwdriver is required.

Context

You can install the combined cabinets on the cement floor with sufficient bearing capacity, on

the ESD floor, or on the cement floor with insufficient bearing capacity.

l The principles you should comply with when placing the cabinets are as follows:

The cabinet can be installed with the side or rear against the wall.

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The cabinets can be installed side by side.

At least 0.8 m of clearance must be reserved in front of the cabinet.

The cabinet must be placed as close as possible to the feeder window to reduce the

length of the feeder.

The levelness of the cabinet must be measured with a level bar. All the cabinets in the

same row must be in a horizontal line.

l In any installation mode, an insulation plate must be added under the lower frame and an

insulation washer must be added to the fastening pieces that fix the lower frame. This is an

effective way to keep the whole set of equipment insolated from the ground before the

PGND cable is connected.

CAUTION

l If you may touch the cabinet (including boards, modules, cables, and components in thecabinet) in an operation, wear an ESD wrist strap and correctly ground it.

l When installing boards, do not touch PCBs or components except jumpers and DIP switches.

l Because the captive screws on the boards in the common subrack are M3 screws, use a #2

cross screwdriver (diameter: 6 mm) when loosen or tighten the screws. If you do not know

the type of the cross screwdriver, try different cross screwdrivers starting from the one with

the greatest diameter until you find a suitable one. Do not use the screwdriver smaller than

the #2 cross screwdriver.

CAUTION





damaged.

Procedure

l Install the BTS3012 combined cabinets.

1. Position the cabinet.

2. Install the cabinet. The cabinets must be close to each other and in a horizontal line.

3. Connect the cabinets on the top using connecting pieces, as shown in Figure 6-1.

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Figure 6-1Connecting combined cabinet on the top

1

2

3

4

(1) Bolt (2) Spring washer 12 (3) Flat washer 12 (4) Cover plate

4. Install the power cables and PGND cables, boards and modules, and cables.

5. Connect the lightning protection failure alarm cables for the main cabinet and

extension cabinets.

6. Connect the lightning protection failure alarm cable for the combined cabinet betweenthe main cabinet and the extension cabinets.

NOTE

The onsite personnel need to find the lightning protection failure alarm cable (5 m, black) for the

combined cabinet among the installation related material, make terminals for it on site, and connect

it to the DSAC in the main cabinet.

7. Install cables for the combined cabinet.

8. Install BTS equipotential cables.

9. Transfer the cable between combined cabinets (the cable is on the panel of the DCSU

in the main cabinet) from the CC_IN port to the CC_OUT port.

10. Set DIP switches for the DCSU.

11. Configure the BTS data on the LMT.

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l Install the BTS3012 cabinet group.

1. Position the cabinet.

2. Install the cabinet.

3. Install the power cables and PGND cables, boards and modules, and cables.

4. Install cables for the cabinet group.

Connect the MD36 male connector on one end to the CKB1 or CKB2 port on the

top of the main cabinet group.

Connect the MD36 male connector on the other end to the CKB1 or CKB2 port

on the top of the extension cabinet group.

5. Install BTS equipotential cables.

6. Set DIP switches for the DCSU.

7. Configure the BTS data on the LMT.

----End

Follow-up Procedure

After the capacity expansion, verify the following items:

1. The alarm related to the extension cabinets is cleared.

2. During the service tests, the extension cabinets run properly.

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7Replacingthe BTS3012 Boards and Modules(-48 V/+24 V)

About This Chapter

This describes how to replace the BTS3012 boards and modules (-48 V/+24 V). The BTS3012

boards that can be replaced are the DTMU, DCCU, DCSU, DATU, DEMU, DELC, DMLC, and

DSAC. The BTS3012 modules that can be replaced are DTRU, DDPU, DCOM, DFCU, DFCB,

and PSU (DC) (+24 V).

7.1 Replacingthe BTS3012/BTS3012AE Boards and Modules (Common Operations)

This describes how to replace the BTS3012/BTS3012AE boards and modules. Most of theBTS3012/BTS3012AE boards are installed in common subracks and signal lightning-protection

subracks. Most of the BTS3012/BTS3012AE modules are installed in the DTRUs and DAFUs.

Some of the operations performed for replacing the boards and modules are common.

7.2 Replacinga BTS3012/BTS3012AE DTMU

This describes how to replace a BTS3012/BTS3012AE DTMU. The DTMUs are installed in

slots 0 and 1 of the common subrack. If a BTS is configured with only one DTMU, replacing

the DTMU disrupts all the services carried on the BTS. If a BTS is configured with two DTMUs

in active/standby mode, replacing the standby DTMU does not affect the services carried on the

BTS. If you need to replace the active DTMU, switch over the active and standby DTMUs.

During the active/standby switchover, the DTMU is reset and BTS services are disrupted. After

the DTMU is reset, replace the former active DTMU. In this way, replacing the DTMU does

not affect the BTS services.

7.3 Replacing a BTS3012/BTS3012AE DPTU

The DPTU is installed in the common subrack.If only one DPTU is configured in the BTS, the

board replacement disrupts all the services carried on the BTS. If a BTS is configured with two

DPTUs in active/standby mode, replacing the standby DPTU does not affect the services carried

on the BTS. If you need to replace the active DPTU, switch over the active and standby DPTUs.

During the active/standby switchover, the DPTU is reset and BTS services are disrupted. After

the DPTU is reset, replace the former active DPTU. In this way, replacing the DPTU does not

affect the BTS services.

7.4 Replacing a BTS3012/BTS3012AE DABB

The DABB can be installed in slot 2, 3, 4, or 7 in the common subrack. Replacing the DABBdisrupts all the services carried on the BTS.

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7.5 Replacing a BTS3012/BTS3012AE DCCU

This describes how to replace a BTS3012/BTS3012AE DCCU. The DCCU is installed in slot

6 of the common subrack. The replacement of the DCCU disrupts all the services carried on the

BTS.

7.6 Replacing a BTS3012/BTS3012AE DCSUThis describes how to replace a BTS3012/BTS3012AE DCSU. The DCSU is installed in slot 5

of the common subrack. The replacement of the DCSU disrupts all the services carried on the

BTS.

7.7 Replacinga BTS3012/BTS3012AE DATU

This describes how to replace a BTS3012/BTS3012AE DATU. The DATU can be installed in

slots 2, 3, 4, and 7. The replacement of the DATU affects the running of the TMA.

7.8 Replacinga BTS3012/BTS3012AE DTRU

This describes how to replace a BTS3012/BTS3012AE DTRU. The DTRU is installed in the

DTRU subrack. The replacement of the DTRU disrupts all the services provided by the DTRU.

7.9 Replacinga BTS3012/BTS3012AE DDPUThis describes how to replace the BTS3012/BTS3012AE DDPU. The DDPU is installed in the

DAFU subrack. The replacement of the DDPU disrupts some services in the cell where the

DDPU is located.

7.10 Replacing a BTS3012/BTS3012AE DCOM

This describes how to replace a BTS3012/BTS3012AE DCOM. The DCOM is installed in the

DAFU subrack. The replacement of the DCOM disrupts the services carried on it.

7.11 Replacing a BTS3012/BTS3012AE DFCU

This describes how to replace a BTS3012/BTS3012AE DFCU. The DFCU is installed in the

Antenna Front-end Unit for DTRU BTS (DAFU) subrack. The replacement of the DFCU

disrupts the services carried on it.

7.12 Replacing a BTS3012/BTS3012AE DFCB

This describes how to replace a BTS3012/BTS3012AE DFCB. The DFCB is installed in the

DAFU subrack. The replacement of the DFCB disrupts the services carried on it.

7.13 Replacing a BTS3012/BTS3012AE DEMU

This describes how to replace a BTS3012/BTS3012AE DEMU. The DEMU is installed in the

common subrack. During the DEMU replacement, the DEMU cannot monitor environment.

7.14 Replacing a BTS3012/BTS3012AE DGPS

The DGPS can be inserted into a slot of the common subrack. Replacing the DGPS affects the

frame synchronization of the BTS with the entire network. However, the services carried by the

BTS are not interrupted.

7.15 Replacing a BTS3012 DELC

This describes how to replace an E1 Signal Lightning Protection Card for the DTRU BTS

(DELC) of t

Documents

BTS3012 Site Maintenance Guide