Replacing an Optical Module
It is assumed that you are familiar with handling optical modules as well as fiber-optic
cables, and are aware of the precautions that should be taken to avoid damage to the
equipment. A summary of how to handle modules and fiber-optic cables is provided in
“Handling Equipment” on p.47.
Several tasks must be completed. Some tasks are detailed in sub-tasks. Pay attention to
the safety notices and additional information that are given below.
Step 1 Read the installation plan to get information about:
• the module type that is to be removed.
• the shelf, which holds this module.
• the slot from which this module is to be removed.
Step 2 Before removing an SCU module, perform the following:
a) Set SCU Connections to "Linear".
b) Note the shelf number displayed on the shelf.
Step 3 Before replacing the spare module of a client channel card protection
configuration, ensure all client channel card protection groups on this module
are set to standby.
Step 4 Follow ESD safety guidelines. Attach the grounding wire to the ESD jack on
the shelf, next secure to your wrist.
Step 5 Find the physical location in the shelf of the module which is to be removed.
Step 6 If mounted, remove the front cover from the shelf as described in “Removing
an SH7HU, SH9HU, or SHX9HU Front Cover” on p.768.
Step 7 Determine the physical location of the optical module to be removed within the
shelf.
Step 8 Check the operating status of the equipment and the present hazard level. If
any module in the system is operating in “Forced On” mode, this may raise the
hazard level of any network element. Do not proceed unless you have training
in laser safety.
Step 9 Identify the optical fiber pairs currently connected to the ports of the module.
For easy identification, complete the tags and attach them to the fibers.
CAUTION
Laser Radiation.
Invisible laser radiation may be emitted from a fiber-optic transmitter if
aperture interlocks are defeated. Never look directly at the optical
connector output beams when disconnecting the optical cables. Looking
directly at laser beams can cause permanent eye damage.
Raman amplifiers are high-powered devices. Always set the Network Port on a
Raman amplifier to 'Disable' before removing an optical cable. Failure to disable the
network port can result in optical connector damage.
FSP 3000R7 Maintenance and Troubleshooting Manual - Product Release 16.2 - Document Issue A 657
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