You should add something like the following to the /etc/pcmcia/config.opts
file. Here it's assumed that isdn is compiled as a module, HiSax has
to be compiled as a module. You will need the latest HiSax from 
the cvs tree, alternatively from ftp.suse.com, or another cvs snapshot
mirror, for Kernel 2.0.32+. It should be relatively easy to patch older
HiSax drivers also, but you'll have to reconcile the .rej files by hand.

There are some different card-init-strings, the first one works fine for my
card, but if You have different card You have to try a bit.
The last one should work for every Sedlbauer speed star.

If Your card has a new card-init-string I like to hear from You.

device "sedl_cs"
  class "isdn" module "net/slhc", "misc/isdn", "misc/hisax" opts "type=22 protocol=2", "sedl_cs"
# Protocol is 1 for 1TR6 and 2 for EDSS1

card "Sedlbauer Speed Star PCMCIA ISDN-Card"
  version "SEDLBAUER", "ISDN-Adapter", " (c) 93-95 VK&CB","*"
  bind "sedl_cs"

card "Sedlbauer Speed Star PCMCIA ISDN-Card"
  version "SEDLBAUER", "ISDN-Adapter", "4D98","*"
  bind "sedl_cs"

card "Sedlbauer Speed Star PCMCIA ISDN-Card"
  version "SEDLBAUER", "ISDN-Adapter", "4D67","*"
  bind "sedl_cs"

card "Sedlbauer Speed Star PCMCIA ISDN-Card"
  version "SEDLBAUER", "ISDN-Adapter", " (C) 93-94 VK&CB","*"
  bind "sedl_cs"

card "Sedlbauer Speed Star PCMCIA ISDN-Card"
  version "SEDLBAUER", "ISDN-Adapter", "*","*"
  bind "sedl_cs"

A sample setup script for the isdn modules is available upon mail request.
It's a modified version from the SuSE setup script. It's not perfect but should
work for a first start.

Any ideas or suggestions? Send me a mail!

--
Marcus Niemann, niemann@www-bib.fh-bielefeld.de
Based on the README.elsa from Klaus Lichtenwalder, Lichtenwalder@ACM.org