A tributary that is provisioned to be a member of a VCG with LCAS enabled is determined to be failed as a result of Loss of Multiframe or its delay is outside the range of differential delay accommodation for the VCG. (SONET failures, for example AIS, mask the Member Signal Unacceptable - LCAS alarm.) In response to this alarm, LCAS may remove the tributary from service. If it does, and at least one tributary remains in service, a VCG Loss of Partial Capacity alarm is also generated.
|
Alarm Data |
Value/Meaning |
|---|---|
|
Severity Levels |
Critical (CR), Major (MJ), Minor (MN), Not Alarmed (NA), Not Reported (NR) SA Default: Minor (MN) NSA Default: Minor (MN) |
|
ASAP Type |
VCG STS Tributary VCG VT1.5 Tributary |
|
AID Type |
STS-1 Ring Channel STS-3c Ring Channel VT1.5 Ring Channel |
|
Date |
Month/day/year that the condition was detected |
|
Time |
Hour:minute:second that the condition was detected |
|
Probable Cause |
MSU-L (Member Signal Unacceptable - LCAS) |
|
Effect on Service |
SA or NSA |
|
Alarm Entity Type |
STS1 STS3C VT1.5 |
|
Description |
Member Signal Unacceptable - LCAS |
|
Likely Cause |
Loss of Multiframe is detected on the STS-1, STS-3c, or VT1.5 tributary that is a member of an LCAS-enabled VCG or the tributary delay is outside the range of differential delay accommodation for the VCG. |
|
Visible Indication |
Lighted CR, MJ, or MN LED on the SYSCTL faceplate (when the severity level is provisioned to Critical, Major, or Minor, respectively) and a flashing Fault LED on the OLIU circuit pack. |
|
Action |
Proceed to Procedure 5-99: Clear "Member Signal Unacceptable - LCAS" alarm. |
| November 2011 | Copyright © 2011 Alcatel-Lucent. All rights reserved. |