Symptom
An OTU board in the OptiX OSN 6800 on a network reports the HARD_ERR or HARD_BAD alarm. After the reported alarm is suppressed on the T2000, the service alarm indicator (SRV) on the board is still red. After the other alarms, if any, are suppressed on the T2000, the service alarm indicator on the board becomes green if the board does not report extra alarms.
Cause analysis
The HARD_ERR and HARD_BAD alarms indicate hardware faults. When the board reports either alarm, it indicates that the hardware of the board is faulty. In this case, the board needs to be replaced. The designing helps the on-site engineers in replacing the board.
Procedure
When the board reports the HARD_ERR or HARD_BAD alarm, it indicates that the hardware of the board is faulty. After these two alarms are suppressed on the T2000, the service alarm indicator on the board is still red.
Result
The OptiX OSN 6800 is designed in this manner to help the on-site engineers in replacing the board.
