Alcatel-Lucent 1643 AMS Operation Manual page 265

Alarm messages
VC-12 Virtual concatenated Loss of multiframe
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Alarm identifier
Information
Alarm category
ASAP
Alarm severity
(default setting)
Reporting state
(default setting)
Local indications
Cause
Actions
Note(s)
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365-312-803R7.2
Issue 4, May 2007
VC12VcLOM
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).
Transmission
sdhVCG
Prompt
Reported
The red fault LED is lit.
Unit failure in the upstream node that generated the K4 multiframe alignment
signal or in the node that reported the alarm.
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
VC-12 Virtual concatenated Loss of multiframe
reporting
faulty unit.
AIS is inserted in the downstream direction.
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