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SmartAX MA5612 Multi-service Access Module
Maintenance Guide
Possible Cause
The actual distance
between the ONU and
OLT exceeds the ranging
compensation distance
configured on the OLT.
The laser on the PON
port is disabled.
The PON port is faulty.
The board or the slot is
faulty.
Issue 01 (2012-07-25)
Judgment Criterion
Run the display port info
command to query the
minimum logical reach (Min
distance) and maximum
logical reach (Max distance)
configured for the PON 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 display port info
command to query the
information about the PON
port. It is found that Laser
switch is in the Off state.
If either of the following two
situations occurs, the PON port
is faulty.
l Run the display port state
command to query the
status of the PON port. It is
found that abnormal items
exist in the query result. For
example, the laser status
(Laser state) is abnormal
and the transmit optical
power (TX power) exceeds
the normal range (1.5-5.0
dBm).
l Migrate the service to
another port. It is found that
the ONU is auto discovered
by the OLT.
Run the display board
command to query the status of
the board. It is found that the
board status is not Normal.
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6 System Fault Handling
Troubleshooting Method
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.
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.
Replace the optical module of
the PON port or replace the
board.
Run the board reset command
to reset the board or change the
board to another slot. If the fault
persists, replace the board.
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Troubleshooting
