Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!ucsd!helios.ee.lbl.gov!pasteur!bob.berkeley.edu!ssheng
From: ssheng@bob.berkeley.edu (Sam Sheng)
Newsgroups: comp.sys.mac.misc
Subject: RS232 connection problem solved
Summary: Connected hayes modem to mac
Keywords: rs232, mac, hayes
Message-ID: <26625@pasteur.Berkeley.EDU>
Date: 1 Aug 90 01:36:57 GMT
Expires: 9 Sep 90 07:00:00 GMT
Sender: news@pasteur.Berkeley.EDU
Reply-To: ssheng@bob.berkeley.edu.UUCP (Sam Sheng)
Distribution: usa
Organization: U.C. Berkeley -- ERL
Lines: 11
X-Local-Date: 31 Jul 90 18:36:57 PDT

Thanks to all that responded about how to hook up an rs232 port to
the db9/rs422 that the mac uses.  As it turns out, the two standards
are more or less compatible; all you need to do is have a proper cable
that hooks up the right pins.

I was able to buy a cable (I believe most apple dealers carry them)
for hooking up the db9 connector to the 25-pin rs232 port on the back
of my Hayes modem, for a very painless 15 dollars or so.

Sam Sheng
(ssheng@zion.berkeley.edu)