Method used to handle the PORTSWITCH_FAIL alarm

Question:
An OSN 6800 reports a PORTSWITCH_FAIL alarm, and the relevant MCA4 board cannot be normally queried.
Analysis:
1. Perform a cold reset on the board on the NMS. The fault persists.
2. Remove and then insert the board onsite. The fault is rectified.
Root cause:
The board is faulty.
Answer:
Perform a cold reset on the board on the NMS, or remove and then insert the board onsite.
Suggestion and conclusion:
None

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