The username is not irrelevant. The Openreach modem deals only with the connection (synchronisation) between your home modem and the port in the cabinet. You then need a router to authenticate on BT Wholesale's radius server.
While the username is checked to ensure the domain is right (@btbroadband.com) the password is not checked by the radius however, routers will not allow you to submit a username without a password.
Edited by lee111s (Fri 17-Feb-12 09:56:20)