1) Open the Browser : http://192.168.1.1
2) Login on ONT: user: telecomadmin
pass: admintelecom
3) Go to : 1) System tools
2) Firmware Upgrade
3) Browse the Firmware
4) Press Upgrade
1) Press "Restart"
After the ONT is restarted, verify if the version is the same as we wanted: 1) Status
2) Device information
3) Software Version
5) If the Firmware is Failed to upgrade than it will appear the notification like this: