Mac <=> modem pin connections

[Info-Mac]

Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10 UW 5/3/83; site uw-beaver
Path: utzoo!linus!philabs!cmcl2!seismo!harvard!wjh12!genrad!decvax!tektronix!uw-beaver!info-mac
From: info-mac@uw-beaver (info-mac)
Newsgroups: fa.info-mac
Subject: Mac modem pin connections
Message-ID:
Date: Tue, 24-Jul-84 16:29:37 EDT
Article-I.D.: uw-beave.1308
Posted: Tue Jul 24 16:29:37 1984
Date-Received: Sat, 28-Jul-84 00:49:52 EDT
Sender: daemon@uw-beave
Organization: U of Washington Computer Science
Lines: 20

From: [email protected]
[Ed. Ok - last word on MACMODEM cables !]

These connections come from the comments in MacTEP version 1.87. I made
my cable using the directions in MacTEP version 1.60 and it works fine.

Mac Modem
1 1 (Frame Ground)
3,8 7 (Signal Ground)
5 2 (Transmit Data)
6 20 (+12V -> Data Terminal Receive (DTR)) [Optional]
7 8 (Clear To Send (CTS) <- DCD) [Optional]
9 3 (Receive Data)

You can get wire, DB-9, and DB-25 connectors at your local Radio Shack. Be
warned, however: the plastic hood they sell for their DB-9 connector will
not let you plug it firmly into the Mac. My solution was simply not to use
the hood. For the DB-25 end, you will want a "solder-type" connector.

-- Thomas.Newton@CMU-CS-Spice