Make sure that labels are affixed in correct direction. That is, after the cable ties are bundled
onto the cable, the identification plates with the labels should face up, and the text on the labels
in the same cabinet should be in the same direction, as shown in
Figure 5-94
Labels for AC power cables
Label on the loaded cabinet side
(indicating the position of the cable
on the power distribution box)
Label on the distribution box side
(indicating the position of the cable
on the loaded cabinet side)
l
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.
l
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.
Huawei AP3x10xN&5x10xN&5x30xN&6x10xN&7x10xN
Hardware Installation and Maintenance Guide
5 Appendix
Issue 11 (2015-05-18)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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