Replacing An Optical Module - Huawei DBS3900 Installation Manual

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An optical module provides a port for opto-electronic conversion. This enables the transmission
between the RHUB3908 and BBU3900 through the optical fiber. Replacing the optical module
requires removing the optical fibers. This interrupts all the services.
Prerequisites
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Context
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Take proper ESD protection measures, such as wearing an ESD wrist strap or ESD gloves to
prevent electrostatic damage to the boards, modules, or electronic components.
Procedure
Step 1 Wear ESD gloves.
Step 2 Record the optical module and fiber connections.
Step 3 Power off the RHUB3908 according to the instructions in
Issue 05 (2015-01-15)
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Replacing an Optical Module

The number and type of faulty optical modules are confirmed, and new optical modules
are available.The new optical modules to be installed must match CPRI rates.
The position for installing an optical module and the cable connection are recorded.
The following tools and materials are available: an ESD wrist strap or ESD gloves, and an
ESD box or bag.
The optical modules are connected to the CPRI0 and CPRI1 ports on the RHUB3908 panel.
An optical module or CPRI fiber optic cable cannot be inserted into or removed from this
CPRI port when the power supply is connected.
Replacing an optical module involves removing an optical fiber and the faulty optical
module, installing a new optical module, connecting the optical fiber to the optical module,
and recovering the links. The operation takes about 10 minutes.
NOTICE
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7 Replacing an Optical Module
4.2 Powering Off the RHUB3908.
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