There are 84 results for topcom usb modem for linux using google, in several languages, some german. have a browse through them, if you get a page with your particular modem mentioned you could politly ask on http://www.linuxtag.org/cgi-bin/yabb/YaBB.pl to see if someone could translate the page for you.

The Google Link:


http://www.google.com/search?hl=en&l...Bmodem%2Blinux