Huawei RRU3256-2500 Users Guide

DBS3900

V100R005C00

RRU3252/RRU3256 Hardware Maintenance Guide

Issue Draft A

Date 2012-11-30

HUAWEI TECHNOLOGIES CO., LTD.

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 a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

Bantian, Longgang Shenzhen 518129 People's Republic of China

Website: http://www.huawei.com

Email: support@huawei.com

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DBS3900 RRU3252/RRU3256 Hardware Maintenance Guide About This Document

About This Document

Purpose

This document describes routine maintenance procedures for an RRU3252/RRU3256 (referred to as RRU in this document), such as equipment preventive maintenance and power-on and power-off operations. It also describes how to replace the RRU and optical modules.

Product Version

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

Product Name

DBS3900 LTE TDD V100R005C00 and later versions

Intended Audience

This document is intended for:

l System engineers

l Site maintenance engineers

Organization

1 Change History

Product Version

This chapter describes changes in the RRU3252/RRU3256 Hardware Maintenance Guide.

2 Preventive Maintenance Items for an RRU

Preventive maintenance for an RRU improves RRU reliability. You are advised to perform scheduled maintenance yearly.

3 Powering On and Powering Off an RRU

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After an RRU is powered on, the RRU indicator status and voltage must be checked. Before an RRU is powered off, you must decide whether to power off the RRU in a normal situation or an emergency based on onsite requirements.

4 Replacing an RRU

A distributed base station consists of RRUs and a BBU. Replacing an RRU interrupts all the services carried by the RRU, and alarms are generated.

5 Replacing an Optical Module

An optical module provides optical-electrical conversion ports, enabling optical transmission between an RRU and other devices. Optical cables inserted into an optical module must be removed before the optical module is replaced. Replacing an optical module interrupts CPRI signal transmission.

Conventions

Symbol Conventions

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

Times New Roman Normal paragraphs are in Times New Roman.

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

Italic Book titles are in italics.

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Description

boldface. For example, log in as user root.

iii

DBS3900 RRU3252/RRU3256 Hardware Maintenance Guide About This Document

Convention Description

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.

[ 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.

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Format Description

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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