Description
As Huawei OTN OSN series support using NE as SDH, PTN, DWDM, OTN and POTN. we installed MUX/DEMUX MR8 and TMB1DAP amplifiers to better utilize the installed OSN 1800 V NEs, The DAP boards support 2 small slots each one can house an amplifier unit totally dependent of the unit in the other slot, but after installing the boards and Sub_boards ((OAC and OBC)) , An alarm raised (SUBCARD_MISMATCH) the alarm source is the DAP boards.
The alarm doesn’t affect services.
SUBCARD_MISMATCH
Procedures of Check
1- first I checked the board software and hardware version with NE version, But I found that NE software is supporting boards and sub boards also.
2- By checking the alarm in the information center, it was mentioned that there is a problem with logical ports whether added wrongly or missed.
The logical ports could be checked from the board panel, so I checked the DAP panel and found the TDC/RDC logical ports are added as 15 and 16 ports, The TDC/RDC number 15 is related to the 1st slot in DAP board and The TDC/RDC number 16 is related to the 2nd slot in the DAP board.
RDC/TDC
-As known the TDC /RDC ports are intended for DCM (Dispersion Compensation Module) connection used in the OAC amplifier unit only, so the RDC/TDC unit should not be added for the subslot uses OBC unit.
– To check which kind of amplifiers are installed in the sunboards, I used the board Manufacturer report and found that 1st slot houses OBC unit and the 2nd slot is equipped with OAC unit.
Manufacturer Report
Solution
As the OBC doesn’t need the logical ports of the RDC/TDC ,So I deleted them from logical ports number 15 in the board panel and then the alarm cleared.
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