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From: smb@ulysses.UUCP (Steven Bellovin)
Newsgroups: net.dcom
Subject: information wanted on DDS service, V.35
Message-ID: <1359@ulysses.UUCP>
Date: Tue, 12-Aug-86 13:34:58 EDT
Article-I.D.: ulysses.1359
Posted: Tue Aug 12 13:34:58 1986
Date-Received: Wed, 13-Aug-86 01:38:02 EDT
Distribution: net
Organization: AT&T Bell Laboratories, Murray Hill
Lines: 9

I'm looking for an introduction to the modulation techniques, etc., used
on DDS lines, especially at 56Kb.  For example, what does a CSU do,
in distinction to a DSU?  (I know that modern units integrate the two
pieces.)  What are the signals on a V.35 interface, and how are they
actually used?  (The V.35 spec will no doubt explain, in highly opaque
language, how they're supposed be used, but that's a different matter...)
I'm very familiar with ordinary modems and RS-232.

		--Steve Bellovin