Hei whilewend

The following is an ISDN PCI card that worked well for me on Knoppix, Suse, Gentoo, you name it, and it doesn't cost much..

see http://www.billion.com/product/isdn/bipacpciv30.htm
It sets up with isdn-config in a minute

regards

EDIT They have a usb one as well, Tiny something or other, which worked fine too