Follow the steps below to upgrade an online ONU.

Step 1: Select the device to be upgraded, and click Upgrade.

Step 2: Click Select Firmware to select a firmware version.

Step 3: After selecting the firmware version, click OK.

Step 4: Click Start Upgrade to create an upgrade task.

If you need to upgrade the device at a specific time, you need to check Scheduled Upgrade, and set the upgrade time. After that, click Start Upgrade. The default number of upgrade attempts is 5.