Hy,
I don't know if this will solve the problem.. but:
Have you had a look at /etc/ppp/peers/dsl-provider
(or whatever your peer-option-file is named)
This file is overriding your option-file-options.
If this is not solving the problem, try to find out which Telekom-NS to use and add them to your /etc/resolv.conf for a 'fast and dirty'-fix of your problem.
You could have a look at
http://www.atelier89.de/users/dirk/t-o/010.html
for finding your nameserver.
regards
Tirsales