Huawei AP4030DN
Hardware Installation and Maintenance Guide
5 Appendix
Issue 02 (2015-05-18)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
95
Figure 5-94
Labels for AC power cables
Meaning of the label in
On the equipment cabinet side, the label marked with "A01-AC1" indicates that the
power cable is connected to the first AC power socket of Row A and Column 01 in the
equipment room.
On the power socket side, the label marked with "B01-AC1" indicates that the power
cable is connected to the first AC power socket in the cabinet of Row B and Column 01
in the equipment room.
5.5 Guide to Using Optical Modules
Common Faults of an Optical Module
1.
An optical module is not completely installed in position.
If the optical module is not completely installed in position and the latch boss is not
secured, the device cannot identify the optical module. After the optical module works
for a long time, it will be ejected under external stress.
2.
The optical receptacle on an optical module is contaminated.
If an optical module is not cleaned or protected properly, contaminants may accumulate
on the fiber pin in the optical module. As a result, the coupling efficiency is reduced,
optical signals are cut off, or even worse, the surface of the fiber pin is damaged
permanently.
3.
An optical module is burnt.
If large-power optical signals (caused by the OTDR or self-loop test) are transmitted
through an optical module that is used for long-distance transmission but no optical
attenuator is used, the optical power will exceed the overload power of the APD pipe.
Then the optical module is burnt.
The preceding faults lead to temporary or long-term cut-off of optical signals; or even cause
permanent damages to the optical module, affecting communication services.
Measures to Prevent Loosened Optical Module
1.
When installing an optical module, insert it into position. If you hear a click or feel a
slight shake, it indicates that the latch boss is secured.
If the latch boss is not secured, the gold finger of the optical module is not in good
contact with the connector on the board. In this case, the link may be connected but
