(1) If your OLT firmware version is newer than 2.4.06, please upgrade the firmware directly

system update firmware FD1108S_FW_V2.4.06_200805_1651_X000.img tftp-server 192.168.1.200
reboot

(2) If your OLT firmware version is older than 2.4.06, please do upgrade steps as below
Please upgrade in CLI:

1.upgrade FD1108S_V2.4.06_200728_X000.img file and then reboot

2.upgrade FD1108S_V2.4.06_200728_X000.img file again but don't reboot olt

3.upgrade FD1108S_FW_V2.4.06_200805_1651_X000.img file then reboot



system update firmware FD1108S_V2.4.06_200728_X000.img tftp-server 192.168.1.200
reboot
system update firmware FD1108S_V2.4.06_200728_X000.img tftp-server 192.168.1.200
system update firmware FD1108S_FW_V2.4.06_200805_1651_X000.img tftp-server 192.168.1.200
reboot