Table of Contents
RRU
Hardware Maintenance Guide
Organization
1 Changes in RRU Hardware Maintenance Guide
This chapter describes the changes in RRU Hardware Maintenance Guide.
2 Preventative Maintenance Items for an RRU
Preventative maintenance improves the reliability of the RRU. You are advised to perform
scheduled maintenance yearly.
3 Powering On and Off an RRU
After an RRU is powered on, check the status of RRU indicators and voltage. Before the RRU
is powered off, follow the normal power-off or emergent power-off procedure as required.
4 Replacing an RRU
This chapter describes the procedures and precautions for replacing a common RRU,
replacing a blade RRU, and replacing a non-blade RRU with a blade RRU by reusing
mounting kits. Replacing an RRU interrupts all the services carried by the RRU and causes
alarms.
5 Replacing an Optical Module
An optical module implements optical-electrical conversion, enabling optical transmission
between an RRU 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.
6 Adding RRUs
This chapter describes the procedure and precautions for adding RRUs with different exteriors
on a pole.
Conventions
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol
Issue 16 (2015-03-23)
Description
Indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.
Indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
Indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
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