T-Online DSL Account

I often have the problem to install DSL-Broadband from T-Online to Router-/Modemhardware not specially designed for it. In their own software, they use a different scheme instead of just plain username + password.

That is not a problem, if you know the structure to build the username yourself, so here is the reminder:

User: Anschlußkennung + T-OnlineNumber + Mitbenutzersuffix@t-online.de
Pass: Your personal Password

Don't forget to remove the + and spaces