Possible Cause Judgment Criterion Troubleshooting Method
The actual distance
between the ONU and
OLT exceeds the ranging
compensation distance
configured on the OLT.
Run the display port info
command to query the
minimum logical reach (Min
distance) and maximum
logical reach (Max distance)
configured for the GPON port.
It is found that the actual
distance between the ONU and
OLT exceeds the ranging
compensation distance.
For example, the actual length
of the optical fiber between the
ONU and OLT is about 25 km,
which exceeds the ranging
compensation distance of 0-20
km.
Run the port range command
to adjust the minimum logical
reach and maximum logical
reach so that the actual distance
between the ONU and OLT is
within the ranging
compensation distance.
NOTE
l By default, the ranging
compensation distance of a
GPON port is from 0 km to 20
km.
l According to Class B+, the
maximum logical reach of a
GPON port must not exceed
60 km, and the difference
between the minimum logical
reach and maximum logical
reach must not exceed 20 km.
The OLT deactivates the
ONU.
Run the display ont info
command to query the ONU
information. It is found that
Control flag is displayed as
deactivated.
Run the ont activate command
to activate an ONU.
NOTE
When an ONU is activated, its
optical module only receives
optical signals but does not
transmit optical signals.
The laser on the PON
port is disabled.
Run the display port info
command to query the
information about the PON
port. It is found that Laser
switch is in the Off state.
Run the port laser-switch
command to enable the laser on
the PON port.
NOTE
By default, the laser on a GPON
port is enabled.
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.
204
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