Hello, friend.
1.Log into the U2000.
2. Choose Administration > Task Schedule > ONT Task List from the main menu.
3. Click the Auto Upgrade Policy tab, right-click, and choose Add Upgrade Policy.
4. Configure the parameters for the auto-upgrade policy in the displayed dialog box. Select Reapply
Configuration After Upgrade. Select the ONT type, server version, version file, and version number, and then click OK.
5. When the ONT provisions services, upgrades ONTs that meet the upgrade policy (this operation takes about four to five minutes) and then configures the service provisioning.
Thanks!