You can restore the factory settings of an ONT in either of the following ways:
Method 1: Restore data on the web page. Common ONT: Choose System Tools > Restore Default Configuration, and click Default.
Method 2: Press and hold the reset key for more than 10 seconds to restore the data.
Note: Restore factory settings: Restore to pre-provisioned factory settings.
Common ONT: Press and hold the reset key to restore the factory settings and restart the device.