OptiX OSN9800 DAPXF board generating the HARD_BAD and OA_LOW_GAIN alarms

1. HARD_BAD alarm parameter 0x15 0x09 0x00 0xff 0xff 0xff.

2. OA_LOW_GAIN is generated at T_OUT.

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The HARD_BAD alarm is generated when the system detects a hardware failure. Based on the alarm parameter, the information is as follows:

Parameter 1 = 0x15: Other faults occur

Parameter 2 = 0x09, parameter 3 = 0x00: indicate an EDFA module on T subcard is faulty.

Due to the EDFA module on Transmit (T) subcard is faulty, the HARD_BAD alarm is followed by OA_LOW_GAIN alarm on the T_OUT port of the T subcard.

It is suspected that the EDFA module is faulty and malfunctioning.

Solution: Replace the DAPXF board.