Problem Description

SSN2BPA01 single board, the input power of BA module is -1dbm, but there is no power output from the OUT output of BA.

Alarm message

None

Processing

1. Query the input power and input wavelength of the BA module of the SSN2BPA single board, which are -1db and 1550NM respectively, and there is no problem.

2, the scene found that the PA module of this single board is not in use, try to introduce the PA module into the input light, and found that the output of the BA module is normal, and at the same time, the PA module also works normally.

Root Cause

Further confirm the reason: SSN2BPA single board BA, PA module is integrated in a single optical module, when the single board to start the ALS function, if there is no light input from any of the BA and PA modules, it will shut down the output of the two optical ports.

Recommendations and Summary

In daily application, BPA single boards are used together, so the ALS function is usually turned on by default; if you only use one optical port of SSN2BPA single board, please use the following command to turn off the ALS function:

:cfg-set-als:board-number,optical-port-number,disable;;:cfg-set-als:board-number,optical-port-number,disable;:cfg-set-als:board-number,optical -port-number ,disable