Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!clyde!uunet!munnari.oz.au!murtoa.cs.mu.oz.au!rob
From: rob@cs.mu.oz.au (Robert Wallen)
Newsgroups: comp.sys.mac
Subject: Re: Mac modem cables recipe
Keywords: modem, do-it-yourself, save$$$
Message-ID: <2893@murtoa.cs.mu.oz.au>
Date: 5 Dec 89 22:19:35 GMT
References: <1303@eutrc3.urc.tue.nl>
Reply-To: rob@murtoa.UUCP (Robert Wallen)
Organization: Comp Sci, Melbourne Uni, Australia
Lines: 17

In article <1303@eutrc3.urc.tue.nl> Frank WGM de Bruyn writes:

>mini DIN-8 connector (male)	DB-25 connector (male)
>Mac Plus			RS232 modem
>4 (Ground)			1,7
>8 (RxD+=Receive Data)		1,7

>DB-9 connector (male)		DB-25 connector (male)
>Mac 512KE			RS232 modem
>1 (Ground)			1

From too many years of making cables for connecting 'things' to 'other things'
I couldnt recommend wiring in pin 1 on the DB25 to the 'ground' on the other
end.  It aint really needed and causes all sorts of weird effects 'sometimes'
when you get ground differences between the two pieces of equipment if they
are located a reasonable distance apart (it bit me connecting Mac to a 
Honeywell Datanet-8 front end processor in the next room)