How to setup an ISDN card?

[KingCrab]

My new core setup works great so far, but I'm not able use my ISDN card for connetions to the outside world. The the card has a hfc-s chipset. I tried a

modprobe zaphfc

but the module wasn't found. A zaptel module is loadable. Next step I tried was

apt-get install zaptel

but apt want to remove asterisk-pluto and pluto-asterisk so I canceled it. Downloading the bristuff package from junghanns.net and compiling everything by myself would replace the asterisk and I think that's no option,too. Has anyone an idea how I to use this card? Alternatively I could use a AVM Fritzcard with capi, but for this I would help to...