The system has detected a virtual container tributary unit (TU) alarm indication signal (AIS) incoming from the active OC-N line. The system responds by transmitting AIS toward the DSX-1 and a Remote Defect Indication (RDI) signal back toward the fiber where the AIS is being received.
|
Alarm Data |
Value/Meaning |
|---|---|
|
Severity Levels |
Critical (CR), Major (MJ), Minor (MN), Not Alarmed (NA), Not Reported (NR) Default: Major (MJ) |
|
ASAP Type |
VC12 Ring Channel |
|
AID Type |
VC-12 Ring Channel |
|
Date |
Month/day/year that the condition was detected |
|
Time |
Hour:minute:second that the condition was detected |
|
Probable Cause |
AIS (AIS detected) |
|
Effect on Service |
SA |
|
Alarm Entity Type |
VC12 |
|
Description |
inc. VC TU-AIS |
|
Likely Cause |
Incomplete or incorrect cross-connect provisioning in end-to-end network; unprotected removal or failure of a DS1/E1 circuit pack at the far-end. In ring applications, a non-service affecting VC TU-AIS alarm message may result from an upstream OLIU or fiber failure affecting only one ring direction. An RDI signal is not returned for a non-service affecting VC TU-AIS. |
|
Visible Indication |
Lighted CR, MJ, or MN LED on the SYSCTL faceplate (when the severity level is provisioned to Critical, Major, or Minor, respectively) |
|
Action |
Proceed to Procedure 5-78: Clear "inc. VC" conditions/alarms. |
| November 2011 | Copyright © 2011 Alcatel-Lucent. All rights reserved. |