Hi friend,
1. Save and back up the configuration file of the OLT.
Run the following command:
save
backup configuration
2. Replace the SCUL board with the SCUN board.
3. Upgrade the SCUN board to the version on the live network.
Run the following command:
load packet
4. After the board runs normally, upload the configuration file to the OLT.
Run the following command:
load configuration
5.Active configuration file
Run the following command:
active configuration
I hope useful to you
thanks