Huawei NE05E Hardware Manual page 232

HUAWEI NE05E,NE08E
Hardware Guide
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Other precautions
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50G Optical Module Installation Guide
1. Precautions for optical module installation
(1) If a cabinet with a door is used, a sufficient distance must be reserved between
the optical module and the cabinet door to prevent the puller or patch cord from
bumping on the door.
Issue 05 (2023-03-31)
Locate the equipment room where the port resides based on the distance
between abnormal points in the OTDR test result. Preliminarily determine the
port location, disconnect the port, and perform an OTDR test on the port that
reports alarms. Check whether the distance is consistent with that in the
previous test. If not, continue to test other ports.
After the abnormal port is found, test the port using a fiber microscope. If the
port is dirty, clean it.
After the port is cleaned, restore the port, and ensure that the connector is
tightened. Perform an OTDR test on the port to check whether loss and
reflection of each link and node are normal.
If the fault persists, replace the flange and perform an OTDR test on the port
that reports alarms to check whether loss and reflection of each link and
node are normal.
If the fault persists, replace the optical fiber and perform an OTDR test on the
port that reports alarms to check whether loss and reflection of each link and
node are normal.
If multiple abnormal points exist on the link, repeat steps 2 to 6.
The optical connector should be horizontally inserted in the receptacle to
avoid damages to the receptacle.
Mixed use of multi-mode and single-mode optical fibers is prohibited.
Otherwise, faults such as signal loss may occur.
Method of distinguishing optical modules in single mode and multi-mode.
Table 3-269 Method of distinguishing optical modules in single mode and
multi-mode
Item
Transmission distance
Wavelength
Information on the
label
Copyright © Huawei Technologies Co., Ltd.
Single mode
10 km or longer
Non-850 nm
SM
3 Hardware Description
Multi-mode
Below 0.5 km
850 nm
MM
224