Huawei NE05E Hardware Manual page 516

HUAWEI NE05E,NE08E
Hardware Guide
4.
5.
Inspecting the Optical Fiber Link
This section describes the insertion loss and reflection requirements of optical links
and the method of checking the quality of optical links for the application of 50G
optical modules with the PAM4 coding technology.
Tools, Equipment, and Materials
Tools and instruments for checking optical fiber links are as follows:
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Precautions
Because the transmit optical power of the OTDR meter is much higher than the
damaged optical power threshold at the receive end, the optical fiber must be
removed from the optical module when the OTDR meter is used to test the optical
path quality.
Currently, the Ethernet port rate is increasing. Since the 50G optical module link
uses the PAM4 encoding technology, there are higher requirements on the optical
Issue 05 (2023-03-31)
Figure 4-111 Unacceptable fibers with imperfections
If any dirt is detected, clean the optical fiber connector. For details, see "
Cleaning Optical Fiber Connectors Using the Cassette
Cleaning Optical Fiber Connectors Using Lens
If any damage is detected, replace the fiber.
OTDR meter
Fiber microscope
CA UTION
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4 Hardware Installation and Parts Replacement
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