David Jones writes:
> Is there any sort of standard interface for ISDN?  Such an interface would
> permit:
> 
> - processes to set up/tear down calls

Sun has an API that they use in their ISDN product. Stealing it might
not be such a bad idea.

> - routing of network protocols (e.g. inet) over ISDN

Well, routing IP over ISDN is more a question of standards than
APIs. I believe there is a standard for this now, although I haven't
checked the RFCs lately.

.pm