driver for teledat x120 isdn controller?

i recently moved to opensuse 11.1 - our isdn controller, a teledat x120 does not seem to work anymore. i suppose i need a new driver but cannot seem to get anywhere - does someone have experience with getting one of these to run under opensuse 11.1 (on an 64-bit dell inspiron 530).

cheers
marcus

Without a PCI- or USB-ID of the device, help will be nearly impossible.