>When we first put the AMD79c30 on the Sparcstation-1- the data
>sheet did indeed refer to ISDN- but the intent was solely
>for Audio. I forget why, but the 79c30 isn't up for ISDN.

Um, the 79C30 is the chip in the ISDN phone on my desk (I looked :-) )
so it's _definately_ up to doing ISDN.  Whether or not the additional
stuff you need is available on your workstation is another question.

--Ken