Huawei AP4050DN-E Hardware Installation And Maintenance Manual page 155

AP4050DN-E
Hardware Installation and Maintenance Guide
4.
5.
Measures to Prevent an Optical Module from Being Burnt
1.
2.
Precautions
1.
Issue 05 (2018-02-02)
Figure 5-172 Installing a protective cap on a fiber
If a receptacle or an optical connector has not been used for a long time and is not
covered with a protective cap, you need to clean it before using it. Clean a receptacle
with a cotton swab, as shown in
tissues.
Figure 5-173 Cleaning a receptacle with a cotton swab
NOTICE
When cleaning a receptacle, insert the cotton swab and turn it slowly in the receptacle.
Do not use too much strength because the receptacle may be damaged.
If optical signals are lost during the operation of a device, use the preceding method to
clean the receptacle or the optical connector. In this manner, the possibility of
contamination can be excluded.
Before using an optical time-domain reflectometer (OTDR) to test the connectivity or the
attenuation of optical signals, disconnect the optical fibers from the optical module.
Otherwise, the optical module will be burnt.
When performing a self-loop test, use an optical attenuator. Do not loosen the optical
connector instead of the optical attenuator.
The optical connector should be vertically inserted in the receptacle to avoid damages to
the receptacle.
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Figure 5-173. Clean an optical connector with cleaning
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