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Posting-Version: version B 2.10.2 9/18/84; site alliant.UUCP
Path: utzoo!linus!alliant!tj
From: tj@alliant.UUCP (Tom Jaskiewicz)
Newsgroups: net.info-terms
Subject: Re: New Idea for RS-232 term.s
Message-ID: <109@alliant.UUCP>
Date: Wed, 20-Nov-85 18:03:29 EST
Article-I.D.: alliant.109
Posted: Wed Nov 20 18:03:29 1985
Date-Received: Sat, 23-Nov-85 07:48:01 EST
References: <319@weitek.UUCP> <3003@brl-tgr.ARPA> <117@emacs.UUCP>
Reply-To: tj@alliant.UUCP (Tom Jaskiewicz)
Organization: Alliant Computer Systems, Acton, MA
Lines: 31
Keywords: RS232, cables
Summary: 

In article <117@emacs.UUCP> pz@emacs.UUCP (Paul Czarnecki) writes:

>>> What I want is a reversing switch.  Just one simple cheap switch on the
>>> back of the terminal that would swap pins 2 and 3.

>>Why are some of your terminals messed up?

>After having maintained a large number (> 150) of RS232 links that were
>all haphazardly installed and mis- or un-labeled, you could better
>appreciate the simple request that the original poster made.

>I little switch like this, although unessessary in the perfect world,
>would be a great boon in the imperfect world.  Thank God for break-out
>boxes.

It's all too true.  And one of our problems was locating the break-out box.
I finally hit upon the solution and had 5 sets of cables made.  Each set
included 3 cables, 1 each of the following:

	1.  Male-to-male, 25 pins, straight thru.
	2.  Female-to-female, 25 pins, straight thru.
	3.  Male-to-female,  25 pins, pins 2 & 3 reversed.

The first 2 cables solve the sex problem.  The last cable solves the crossover
problem.  It makes it easy to install a new terminal.
-- 

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