When the auxiliary board EOW on the OptiX OSN 7500 was faulty, other boards could not be detected. After the EOW board was cold reset, other boards were detected. However, configuring NE services failed, and the NE reported the COMMUN_FAIL alarm. The fault was rectified by replacing the EOW board.
Symptom
The indicators on some OptiX OSN 7500 boards turned red, and configuring NE services failed. After the EOW board was cold reset, the indicators on these boards were not red again. However, configuring NE services still failed, and the NE reported the COMMUN_FAIL alarm.
Procedure
- Found out the boards on which the indicators turned red. Assumed that one such board was in slot 26.NOTE:If the indicator on a board is red, it means that the board cannot be detected.
- Remove the board in slot 26 and installed the board in another slot. The indicator was not red again, and the board were detected. Therefore, the issue was not related to the board in slot 26 or the SCC board.
- Cold reset the EOW board. The indicator on the board in slot 26 was not red. However, configuring NE services still failed, and the NE reported the COMMUN_FAIL alarm.
- Replaced the EOW board. The COMMUN_FAIL alarm cleared, and configuring services for the board in slot 26 was successful.
Related Information
If some boards on the OptiX OSN equipment cannot be detected, determine the most possibly faulty board. For example, on the OptiX OSN 7500, the issue may be caused by an EOW board, and on the OptiX OSN 3500, the issue may be caused by an AUX board.
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