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From: kaufman@Neon.Stanford.EDU (Marc T. Kaufman)
Newsgroups: comp.dcom.sys.cisco,comp.dcom.lans,comp.dcom.modems
Subject: Re: V.35 null modems
Message-ID: <1991Jan5.180030.18891@Neon.Stanford.EDU>
Date: 5 Jan 91 18:00:30 GMT
References: <1991Jan4.145007.22904@sobeco.com> <1991Jan5.062616.7340@spectrum.CMC.COM>
Organization: Computer Science Department, Stanford University
Lines: 11

In article <1991Jan5.062616.7340@spectrum.CMC.COM> lars@spectrum.CMC.COM (Lars Poulsen) writes:

-V.35 uses a differential signal with
-less than 1 Volt drive. I never understood why the phone companies liked
-it so much when we already had RS422 which had +-5V drive which is
-enough umph to drive lights directly and even to interoperate with RS232
-in a pinch.

V.35 predates RS422 by maybe as much as 10 years.

Marc Kaufman (kaufman@Neon.stanford.edu)