This page was written for those of us in the UK who use ISDN with BT. Since Broadband came along things have changed a lot. However, quite a few of us are still unable to have access to broadband even if we live in a large city. That's why this page exists. Setting up an ISDN terminal adapter with SuSE Linux doesn't have to be all that difficult. Just a bit fiddly. First have a good long read of the ISDN Howto in the docs that came with your SuSE distribution. Then sit down and think about it for a while. You might want to send e-mail to someone else about ISDN and Linux. If (like me) you can only get hold of a BT ISDN line then don't panic. Both ISDN2e and Home Highway work very well with Linux since the 2.0.xx kernels came along. The introduction of YaST2 has made life a lot easier but you still have to work out which ISDN card to use.
The Sedlbauer cards are good but they might be difficult to find. For further info about hardware have a look at the SuSE hardware database.
There is also the BT Speedway card which is essentially a German card with the name changed. Who says this ? Well, that's the way that it's set up on my ISDN box. This information came from the German i4L programmers. Several people have had problems with these cards as well. It's best to think that ISDN may not work until you can have a chat with someone who has already got it to work. Once it is working then it is worth the effort. ISDN on Linux is rock solid as long as you have a proper firewall.
There are several web sites which give much detailed information about setting up ISDN with Linux. Have a look at...
It might be that you have a nasty little ISDN problem that you can't solve ? There are two ways out of this (other than jumping off a cliff). You can subscribe to the Sheflug discussion list or you can subscribe to the bi-lingual ISDN discussion list in Germany. Have a look at http://www.isdn4linux.de/