The system has detected a loss-of-frame (LOF) condition in an incoming DS1 signal. LOF is declared when an out-of-frame (OOF) defect persists for 2.5 (±0.5) seconds, except when AIS is present.
|
Alarm Data |
Value/Meaning |
|---|---|
|
Severity Levels |
Critical (CR), Major (MJ), Minor (MN), Not Alarmed (NA), Not Reported (NR) Default: Not Alarmed (NA) |
|
ASAP Type |
DS1 Port |
|
AID Type |
DS1 Port |
|
Date |
Month/day/year that the condition was detected |
|
Time |
Hour:minute:second that the condition was detected |
|
Probable Cause |
LOF (Loss of frame) |
|
Effect on Service |
SA or NSA |
|
Alarm Entity Type |
T1 |
|
Description |
inc. (from DSX) DS1 LOF |
|
Likely Cause |
The upstream DS1 terminal equipment failed or there is incorrect DS1 port provisioning at either the upstream DS1 terminal equipment or the local network element. |
|
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 alarmed circuit pack. |
|
Action |
Proceed to Procedure 5-50: Clear "inc. (from DSX) DS1" alarms. |
| November 2011 | Copyright © 2011 Alcatel-Lucent. All rights reserved. |