Huawei DRH Owner's manual

DRH

Hardware Maintenance Guide

Issue

1.0

Date

2013-04-10

HUAWEI TECHNOLOGIES CO., LTD.

Issue 1.0(2013-04-10)

Huawei Proprietary and Confidential

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

DRH

Hardware Maintenance Guide

1 About This Document

Issue 1.0(2013-04-10)

Huawei Proprietary and Confidential

About This Document

Purpose

This document describes routine maintenance procedures for a DRH (referred to as DRH in

this document), such as equipment preventive maintenance and power-on and power-off

operations. It also explains how to replace the DRH and optical modules.

Product Versions

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

Product Name

Product Version

DRH

V100R001

Intended Audience

This document is intended for:

System engineers

Site maintenance engineers

Organization

1Changes in the DRH Hardware Maintenance Guide

This chapter describes the changes in the DRH Hardware Maintenance Guide.

2 Preventative Maintenance Items for a DRH

Preventative maintenance improves the reliability of the DRH. You are advised to perform

scheduled maintenance yearly.

3 Powering On and Off a DRH

After a DRH is powered on, check the status of DRH indicators and voltage. Before the DRH

is powered off, follow the normal power-off or emergent power-off procedure as required.

4 Replacing a DRH

A distributed base station consists of DRHs and a DCU. Replacing a DRH inteDRHpts all the

services carried by the DRH, and alarms are generated.

5 Replacing an Optical Module

DRH

Hardware Maintenance Guide

1 About This Document

Issue 1.0(2013-04-10)

Huawei Proprietary and Confidential

iii

An optical module implements optical-electrical conversion, enabling optical transmission

between a DRH and other devices. You must disconnect optical fibers from an optical module

before replacing the optical module. Disconnecting the optical fibers interrupts the

transmission of CPRI signals.

DRH

Hardware Maintenance Guide

1 Contents

Issue 1.0(2013-04-10)

Huawei Proprietary and Confidential

Contents

1 Changes in the DRH Hardware Maintenance Guide.......................................................... 1

2 Preventative Maintenance Items for a DRH......................................................................... 2

3 Powering On and Off a DRH ................................................................................................. 4

3.1 Powering On a DRH.................................................................................................................................. 4

3.2 Powering Off a DRH ................................................................................................................................. 5

4 Replacing a DRH...................................................................................................................... 6

5 Replacing an Optical Module............................................................................................... 11

DRH

Hardware Maintenance Guide

1 Changes in the DRH Hardware Maintenance Guide

Issue 1.0(2013-04-10)

Huawei Proprietary and Confidential

1 Changes in the DRH Hardware

Maintenance Guide

This chapter describes the changes in the DRH Hardware Maintenance Guide.

Date

Issue

Description

Author

2013-04-10

V1.0

First release

ID: h00173116/z00138293

DRH

Hardware Maintenance Guide

2 Preventative Maintenance Items for a DRH

Issue 1.0(2013-04-10)

Huawei Proprietary and Confidential

2 Preventative Maintenance Items for a

DRH

Preventative maintenance improves the reliability of the DRH. You are advised to perform

scheduled maintenance yearly.

When working at heights, the maintenance personnel need to exercise caution to avoid falling

of objects, which may cause injuries or death. In addition, the maintenance personnel must

always wear helmets in the working area and avoid dangerous areas.

The items in the following checklist are not mandatory but strongly recommended. Table 2-1

lists the preventative maintenance items for a DRH.

Table 2-1 Preventative maintenance items for a DRH

No.

Item

All DRHs are properly installed and in good condition.

The cable seals at the entry points of the cabinet are in good condition.

All RF cables are free from wear, cuts, cracks, or other damage.

All RF cable connectors are sealed properly.

All RF cable conduits are in good condition.

All power cables are free from wear, cuts, cracks, or other damage.

All power cable connectors are in good condition.

All power cable conduits are in good condition.

All shield layers of power cables are in good condition.

All power cables are in good condition.

All CPRI optical fibers are free from wear, cuts, cracks, or other damage.

All screws are tightened on the cover plate of the maintenance cavity.

DRH

Hardware Maintenance Guide

2 Preventative Maintenance Items for a DRH

Issue 1.0(2013-04-10)

Huawei Proprietary and Confidential

No.

Item

All alarm cables (optional) are installed and free from any damage.

All monitoring cables (optional) are installed and free from any damage.

If any of the requirements in the checklist is not met, perform the following corrective actions.

1. Tighten all connections.

2. Report the problems to the supervisor so that the qualified engineers can be assigned to

maintain the DRH.

DRH

Hardware Maintenance Guide

3 Powering On and Off a DRH

Issue 1.0(2013-04-10)

Huawei Proprietary and Confidential

3 Powering On and Off a DRH

After a DRH is powered on, check the status of DRH indicators and voltage. Before the DRH

is powered off, follow the normal power-off or emergent power-off procedure as required.

3.1 Powering On a DRH

Switch on the circuit breakers on the auxiliary power device for a DRH and observe the

indicators on the DRH to check the running status.

Prerequisites

The DRH hardware is installed and DRH cable connections are secure.

The input voltage of a DC DRH ranges from -36 V DC to -57 V DC.

The input voltage of an AC DRH ranges from 90VAC to 290 VAC.

Context

After you unpack a DRH, you must power on it within 24 hours. If you power off the DRH

for maintenance, you must restore power to the DRH within 24 hours.

Procedure

Step 1 To power on the DRH, set the corresponding circuit breaker on the auxiliary power device for

the DRH to ON.

Do not look into the optical module without eye protection after the DRH is powered on.

Step 2 Wait for three to five minutes, and then check the status of the indicators on the DRH. For

details, see section "DRH Indicators" in the DRH Hardware Description.

DRH

Hardware Maintenance Guide

3 Powering On and Off a DRH

Issue 1.0(2013-04-10)

Huawei Proprietary and Confidential

If DRHs are cascaded, check the status of all DRH indicators.

Step 3 Take corresponding actions based on the status of the indicators.

If...

Then...

The DRH is operating properly

End the power-on check task.

The DRH is faulty

Set the circuit breaker to OFF, rectify the

fault, and go to Step 1.

----End

3.2 Powering Off a DRH

The procedure for powering off a DRH varies with the actual condition, for example, in a

normal situation or an emergency. You must power off the DRH in a normal situation such as

moving the equipment or anticipating a territorial blackout. You must also power off the DRH

in an emergency such as a fire, smoke, or water damage.

Procedure

To perform a normal power-off, perform the following steps:

If DRHs are cascaded, consider the impacts of power-off operations on lower-level DRHs to prevent

service interruption.

Step 1 Set the corresponding circuit breaker on the auxiliary power device for the DRH to

OFF.

To perform an emergent power-off, perform the following steps:

Emergent power-off may lead to damage on the DRH. Therefore, this type of power-off is not

recommended in normal cases.

Step 1 Disconnect the power supply from the auxiliary power device for the DRH.

Step 2 If time permits, set the corresponding circuit breaker on the auxiliary power device

for the DRH to OFF.

----End

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