I've been trying to get a
D-Link DSL 200 Rev C1 ADSL USB modem working both under Fedora and Debian. And the effort is fruitless yet.
D-Link officially doesnt support Linux for the modem. So I tried with many things. Most importantly with eciadsl available from flashtux.org.
There seems to be people who got to work DSL 200 but they were not using Rev C1. I even looked in to other tutorials too. Eg:
http://users.tpg.com.au/johnd/dsl200.html
I'm not asking anyone to give a step by step tutorial or I'm not going to tell all the things I've been doing (because of length).
If anyone has suceeded in getting a Rev C1 modem work in Linux, please just let me know.