VC-12 Virtual concatenated Loss of multiframe
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Alarm identifier
VC12VcLOM
Information An unexpected, unsequential pattern has been detected in either the multiframe
1 (MF1) or multiframe 2 (MF2) of at least one VC-12 in a Virtual
Concatenation Group (VCG).
Alarm category Transmission
ASAP sdhVCG
Alarm severity
(default setting)
Prompt
Reporting state
(default setting)
Reported
Local indications The red fault LED is lit.
Cause Unit failure in the upstream node that generated the K4 multiframe alignment
signal or in the node that reported the alarm.
Actions Check on the management system if unit failure is reported for the unit
generating the multiframe alignment signal.
In that node, remove the unit and replace it with a new one.
If the unit failure is not reported, loop the transport signal of the VC-12 at the
transmitting node and at the receiving node. In this condition, the node
reporting
VC-12 Virtual concatenated Loss of multiframe contains the
faulty unit.
Note(s) AIS is inserted in the downstream direction.
Alarm messages
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365-312-803R7.2
Issue 4, May 2007
Alcatel-Lucent - Proprietary
See notice on first page
1-245
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