Chapter 2 Alarm
Handling Procedure
1.
Check whether the flag of C2 signal sent from NR8250 upstream equipment is correct,
which is 0X12 for VC4 and 0x02 for VC12.
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If yes, go to step 2.
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If no, modify the configuration.
2.
The alarm is caused by RTUB board failure. Replace the board.
2.2.20 134237754 TU-PLM
Alarm Property
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Alarm Code: 134237754
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Alarm Information: The alarm is reported if tributary unit signal flag is mismatched.
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Alarm Level: Major
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Alarm Type: Communications Alarm
Sub-code Description
Each subcode represents a timeslot. The former 63 timeslots are used for optical port
1,and the latter 63 timeslots are used for optical port 2.
Effect on the System
All the relay receive signals transmitted on the SDH link may be interrupted.
Possible Causes
1.
The signal flag received by NR8250 equipment is inconsistent with that sent by the
upstream equipment.
2.
The RTUB board that reports the alarm is faulty.
Handling Procedure
Contact the network engineer.
2.2.21 134237756 TU-LOP
Alarm Property
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Alarm Code: 134237756
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Alarm Information: The alarm is reported if tributary unit pointer is lost.
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Alarm Level: Major
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Alarm Type: Communications Alarm
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