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From: dcrocker@AHWAHNEE.STANFORD.EDU (Dave Crocker)
Newsgroups: comp.protocols.iso
Subject: Re:  ISDN and OSI relationship
Message-ID: <8906172235.AA25320@ucbvax.Berkeley.EDU>
Date: 22 Jul 89 14:37:52 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
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Let me try to parade my ignorance and see if anyone wants to join,
waiving flags are playing appropriate marching music:

As I perceive ISDN, it is a conduit for raw bits, roughly on the "level"
with X.25.  (Lots of differences in mechanism, etc, but its actual
utility to a person/resource is at that level.)

Hence, it fits into OSI Layer 2 and the sub-network sub-layer of Layer
3.  To plug it into the rest of the OSI stack, you build an appropriate
Subnetwork Dependent Convergence Module, also in Layer 3, and then the
rest of the stack doesn't know there is anything special to deal with.

Yes?

Dave