Possible Cause Judgment Criterion Troubleshooting Method
The ODN is not properly
planned.
NOTE
l The split ratio of the
ODN link is not
determined by the
number of ONUs
connected but by the
split ratio of optical
splitters. When an
optical splitter is
connected to the ODN,
attenuation occurs and
the split ratio of the
optical splitter needs to
be calculated.
l Protocols specify that
the receive optical
power of the OLT
should not exceed 15
dB. In addition, the
difference between the
maximum optical
power and the
minimum optical
power should not
exceed 15 dB.
The ODN does not meet the
requirements of the ODN link
plan or GPON.
l Three-level splitting exists
in the ODN.
l The network coverage of
the ODN exceeds 20 km by
far.
l The split ratio exceeds the
specification. For example,
a board supports a
maximum of 1:64 split
ratio. If the first-level split
ratio is 1:8, the second-level
is 1:16, the actual split ratio
is 1:128. This exceeds the
specification (1:64).
l The optical attenuation
difference of two optical
lines exceeds 15 dB.
Optimize the ODN to meet
Huawei's ODN planning
requirements and protocol
requirements.
The optical splitter is
faulty or the connectors
on the optical splitter are
not clean.
Measure the input and output
optical power of the optical
splitter by using the optical
power meter. It is found that the
actual attenuation exceeds the
theoretical attenuation.
NOTE
The faults in the optical splitter
cannot be located by the OTDR
because the OTDR cannot
penetrate the optical splitter.
Replace the faulty optical
splitter or clean the connectors
on the optical splitter.
Step 4 Check for the possible causes on the ONU and troubleshoot the faults accordingly. If the ONU
still fails to recover its configurations after that, go to Step 5.
Possible Cause
Judgment Criterion Troubleshooting Method
The ONU has been
configured at local and
the configurations
conflict with
configurations issued by
the OLT.
The management-related ONU
configurations such as IP
address and management mode
are configured on the web page.
Delete the web page
configurations and issue
configurations to the ONU by
the OLT.
SmartAX MA5612 Multi-service Access Module
Maintenance Guide 6 System Fault Handling
Issue 01 (2012-07-25) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
214
To Next Page
Loading...
