Multiple failures have isolated a node or nodes in a BLSR. At switching nodes, an alarm indication signal (AIS) is inserted on any traffic coming to/from an isolated node(s) to protect against improperly connecting traffic. Extra traffic, if supported, is squelched at the drop nodes.
|
Alarm Data |
Value/Meaning |
|---|---|
|
Severity Levels |
Not Alarmed (NA) |
|
AID Type |
OC-48 line OC-192 line |
|
Date |
Month/day/year that the condition was detected |
|
Time |
Hour:minute:second that the condition was detected |
|
Probable Cause |
RNG-SQUELCH (Traffic Squelched on Ring) |
|
Effect on Service |
Standing Condition (SC) |
|
Alarm Entity Type |
OC48 OC192 |
|
Description |
Traffic Squelched |
|
Likely Cause |
Ring segmentation due to multiple failures in the BLSR; inc. OC-48/OC-192 line AIS, inc. OC-48/OC-192 LOS, or inc. OC-48/OC-192 LOF alarms are detected at two nodes on the BLSR; node power failure occurred at another node in the BLSR; simultaneous forced switches on different spans in the BLSR. |
|
Visible Indication |
Lighted ABN LED on the SYSCTL faceplate. |
|
Action |
Proceed to Procedure 5-141: Clear "Traffic Squelched" condition. |
| November 2011 | Copyright © 2011 Alcatel-Lucent. All rights reserved. |