QTECH#load application tftp inet 192.168.66.1 QSW-9001-V100R001B01D001P006SP10.arj 
Downloading application via TFTP...
Download application via TFTP successfully.

После успешной загрузки прошивки перезагружаем OLT:

QTECH#reboot 
If you do not save the settings, all changes made will be lost.
Are you sure you want to proceed with the system reboot(y/n)?[n]y

QTECH#

    Hardware version: V3.0
    BSP version: 2.30
    Count down to auto-boot...
     0
    boot from flash......

Loading image......OK!
Unarj image........OK!


Смотрим версию прошивки.