Hi, Gerard.
You can perform the following steps to modify:
Connect a mobile phone to the Wi-Fi network of the edge ONT.
Enter the IP address in the address box of a browser and press Enter. (For details about the IP address, see the product nameplate.)
On the displayed login page, enter the login password as prompted.
Choose My Wi-Fi on the web page, and change the Wi-Fi name and password.
Thanks.