You may have a bit of a game getting that modem working.
the first place to find out more about your modem. You say that you're trying SuSE 9.1 personal, well is it a "boxed set" ? because they've usually got some stuff about configuration in the book's.
another good place to start looking.
I'd suggest that you have a good look through the linked pages, you may have to be more specific in your identification of your modem.
Sorry I can't be of more help, I also had an internal ham modem, but I don't bother with it as I've got a dsl line, plugged up via a modem/router and an ethernet NIC