Newsgroups: alt.comp.hardware.homebuilt,comp.robotics
Path: brunix!cat.cis.Brown.EDU!agate!howland.reston.ans.net!newsserver.jvnc.net!jvnc.net!tigger.jvnc.net!sestrich
From: sestrich@dovetail.timeplex.com (Joe Sestrich)
Subject: Re: Long Serial I/O Lines
In-Reply-To: Donald.Heller@jpl.nasa.gov's message of Mon, 27 Jun 1994 16:38:33
Message-ID: <SESTRICH.94Jun28094552@dovetail.timeplex.com>
Sender: news@tigger.jvnc.net (Zee News Genie)
Nntp-Posting-Host: dovetail.timeplex.com
Organization: Ascom Timeplex, Acton, MA
References: <Donald.Heller.134.0010A506@jpl.nasa.gov>
Date: Tue, 28 Jun 1994 13:45:52 GMT
Lines: 11


Long ago and far away, when I had a VT-100 on my desk, running 9600 baud to
a VAX on the other end of a large (200K ft^2) building, I was quite happy with
the performance of el-cheapo phone wire carrying rs232 signals.  It was claimed
at the time that current loop was necessary for such distances, but experience
proved differently.  Go for the rs232.  Worst case if it doesn't work you might
have to change drivers/receivers to current loop or differential, so make sure
your cable has 4 conductors....
--

	Joe Sestrich				ASCOM Timeplex
