Cause why the alarm indicator of the OTU board is red even after the HARD_ERR alarm is suppressed

Question:
An OTU board on an OSN 6800 NE reports a HARD_ERR or HARD_BAD alarm. After the alarm is suppressed on the T2000, the board indicator on the T2000 is still red. When other alarms are suppressed and there is no additional alarm on the board, the board indicator is green.
Analysis:
The HARD_ERR and HARD_BAD alarms are at the hardware maintenance level. In general, the alarms indicate board hardware faults and the boards need to be replaced. Therefore, the alarm indicator is still on even when the HARD_ERR and HARD_BAD alarms are suppressed to instruct onsite engineers to replace the boards.
Root cause:
None
Answer:
The OSN 6800 is designed in this manner to instruct onsite engineers to replace faulty boards.

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