My old TT ISP gave me a Username and a Password via a letter that I could type into the Modem settings !
Ironically, those with a proper (unbundled) TalkTalk LLU account, can enter "N E FINK" for both the PAP/CHAP username and password (remember the spaces though). Half joking there! TalkTalk LLU does genuinely work without end-user authentication. Both PAP/CHAP authentication at the PPP layer is disabled as is authentication by DHCP.
TalkTalk, since it owns and manages its own DSLAMs, must keep subscriber line records. These records will reference the subscriber pair that terminate on each port of a linecard. Therefore authentication is in hardware. So no username/password needs to be entered when configuring a modem for TalkTalk LLU. It also means that modems "locked" to BT will still work with TalkTalk LLU
Oops! Not sure if that is by TalkTalk's design or not!
It is confusing, NewtronStar. Since BT(infinity) does not, for FTTC, require authentication at the PPP layer, it raises a question:
How do other FTTC providers who use the same Openreach mini-DSLAMs authenticate their users? Dunno about the ECI MSAN but with the Huawei (MA5616) MSAN, authentication can be performed in two ways. Either by the MSAN itself, or by a remote authentication server, run by the ISP.
cheers, a