The near-end network element is receiving unstable K-bytes in the APS channel for the 1+1_BIDIR or 1+1_OPTM protection group (bits 5–8 of the K1 byte), or the near-end network element is receiving K-bytes with invalid values. The APS channel is provided by the K1 and the K2 bytes in the SONET section overhead of an OC-N to communicate the protection switching protocol between the local and far-end nodes.
|
Alarm Data |
Value/Meaning |
|---|---|
|
Severity Levels |
Critical (CR), Major (MJ), Minor (MN), Not Alarmed (NA), Not Reported (NR) Default: Major (MJ) |
|
ASAP type |
1+1 Bidirectional Protection Group 1+1 Optimized Protection Group |
|
AID Type |
OC-N line |
|
Date |
Month/day/year that the condition was detected |
|
Time |
Hour:minute:second that the condition was detected |
|
Probable Cause |
APSB (APS Byte Failure) |
|
Effect on Service |
NSA |
|
Alarm Entity Type |
OCN |
|
Description |
Protection switching byte failure |
|
Likely Cause |
The OC-N line at the near-end network element has been provisioned to 1+1_BIDIR or 1+1_OPTM, but the OC-N line at the far-end network element has been provisioned to an incompatible protection group type. For example, the near-end OC-N line is provisioned to 1+1_BIDIR, and the far-end OC-N line is not provisioned to 1+1_BIDIR. |
|
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 5-114: Clear "Protection switching byte failure" alarm. |
| November 2011 | Copyright © 2011 Alcatel-Lucent. All rights reserved. |