Huawei SmartAX MA5612 Maintenance Manual page 226

SmartAX MA5612 Multi-service Access Module
Maintenance Guide
Fault
Scope
OLT
ODN
Issue 01 (2012-07-25)
Symptom
A single ONU or some
ONUs connected to an
OLT fail to be auto
discovered by the OLT.
All the ONUs connected
to a PON port on an OLT
fail to be auto discovered
by the OLT.
All the ONUs connected
to a board on an OLT fail
to be auto discovered by
the OLT.
A single ONU or some
ONUs connected to an
OLT fail to be auto
discovered by the OLT.
All the ONUs connected
to a PON port on an OLT
fail to be auto discovered
by the OLT.
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Possible Cause
The actual distance between the ONU and OLT
exceeds the ranging compensation distance
configured on the OLT.
l The ONU auto discovery function is disabled
on the PON port.
l The laser on the PON port is disabled.
l The PON port is faulty.
The board or the slot is faulty.
l The branch fiber is bent excessively.
l The branch fiber connector is not clean.
l Different types of branch fiber connectors are
interconnected.
l The multi-mode optical fiber is used as the
branch fiber.
l The ODN is not properly planned. For
example, the split ratio, network coverage and
attenuation difference are not planned within
the proper ranges.
l The optical attenuation of the optical path is
excessively small.
l A branch fiber break occurs.
l The optical splitter is faulty or the connectors
on the optical splitter are not clean.
l The backbone fiber is bent excessively.
l The backbone fiber connector is not clean.
l Different types of backbone fiber connectors
are interconnected.
l The multi-mode optical fiber is used as the
backbone fiber.
l A backbone fiber break occurs.
l The optical splitter is faulty or the connectors
on the optical splitter are not clean.
6 System Fault Handling
217