| ID | Name | Meaning |
|---|---|---|
| 1 | Subrack No. | Number of the subrack where the alarm is generated |
| 2 | Slot No. | Number of the slot where the alarm is generated |
| 3 | Sub slot No. | Number of the sub slot where the alarm is generated |
| 4 | Optical Port No. | Number of the optical port where the alarm is generated |
| 5 | Switch Request | 15=Lock of Protection,14=Forced Switch,13=SF-High Priority,12=SF-Low Priority,11=SD-High Priority,10=SD-Low Priority,8=Manual Switch,6=Wait-to-Restore,4=Exercise Switch,1=Do Not Revert,0=No Request |
| 6 | Switch Type | 0=Local Request,1=Remote Request,2=Local Request |
| 7 | Alarm Attribute | 0=Normal, Alarms period are longer than the Transient Threshold. 1=Transient Count, The times and the period of the alarms whose periods are shorter than the Transient Threshold are summed up. If the sum result is longer than the Alarm Occurrence Period Threshold or Alarm Occurrence Times Threshold, an alarm so called Transient Count Alarm is triggered. Because Transient Count Alarm is based on accumulative result, the recovery of the alarm may occur at least one Summing Cycle later. The Summing Cycle can be query by MML "LST STATSLDWIN". |
If the switch request is forced switch, signal fail, or manual switch, the traffic is switched over to the protection section.