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
Copyright © Huawei Technologies Co., Ltd.
i
Copyright © Huawei Technologies Co., Ltd. 2013. 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 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:
[e-mail]

DRH
Hardware Maintenance Guide
1 About This Document
Issue 1.0(2013-04-10)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
ii
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
Copyright © Huawei Technologies Co., Ltd.
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
Copyright © Huawei Technologies Co., Ltd.
iv
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
Copyright © Huawei Technologies Co., Ltd.
1
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
Copyright © Huawei Technologies Co., Ltd.
2
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
1
All DRHs are properly installed and in good condition.
2
The cable seals at the entry points of the cabinet are in good condition.
3
All RF cables are free from wear, cuts, cracks, or other damage.
4
All RF cable connectors are sealed properly.
5
All RF cable conduits are in good condition.
6
All power cables are free from wear, cuts, cracks, or other damage.
7
All power cable connectors are in good condition.
8
All power cable conduits are in good condition.
9
All shield layers of power cables are in good condition.
10
All power cables are in good condition.
11
All CPRI optical fibers are free from wear, cuts, cracks, or other damage.
12
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
Copyright © Huawei Technologies Co., Ltd.
3
No.
Item
13
All alarm cables (optional) are installed and free from any damage.
14
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
Copyright © Huawei Technologies Co., Ltd.
4
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
Copyright © Huawei Technologies Co., Ltd.
5
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