Monday, July 17, 2023

Unauthenticated Transcivers on OSN9800U32-E

This article shares with you a case when the NE didn’t get the received optical power of the 1G SFP after being installed in Huawei OSN9800 U32, and how we find out the reason.

 

Description 

- As we come to make a connection in the level of 1G Ethernet between SDH OSN7500 EGS4 board and OSN980032U-E E-224 board, we installed the SFPs in the ports and connected the fiber after that, I come to check the Optical power TX and RX in both NEs but, I couldn’t find any reading for the power in the OSN9800U32E side, while it was a available in the OSN7500.

 

power values

Steps Of Checking 

1-After making sure that the ports are enabled, I started with alarms checking but there where no alarm, no R-LOF or R-LOS in both ends.

2-Asking the personnel in the field to exchange the SFPs in both NEs, So the SFP in OSN9800 installed in the SDH and the inverse, but the problem persisted in the OSN9800.

3-I come to open all the suppressed alarms in the OSN9800, After that an alarm appeared ( Module not Authenticated )

Unauthenticated

4- The alarm description indicates that This alarm is reported when the optical module is not authenticated by Huawei and by checking the board  Manufacturer information , I found that the SFP was bought of third party vendor and it wasnt standard, as it wasnt supporting the DDM function.

 

- DDM means “Digital diagnostics monitoring”. It can monitor the parameters of fiber modules like optical output power, optical input power, temperature, laser bias current, and transceiver supply voltage, in real time. So if there is any problems with your optical transceivers and can not work well. Then first you may get to see all these parameters of your transceivers at that time with DDM. Then you may find out the problem and solve it quickly, And so NCE can read the DDM information of the optical module.

- After replacing the SFP with Huawei Authorized one the power values appeared and the problem solved

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