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From: info-mac@uw-beaver (info-mac)
Newsgroups: fa.info-mac
Subject: Mac <=> modem pin connections
Message-ID: <1308@uw-beaver>
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: Thomas.Newton@cmu-cs-spice.arpa
[Ed. Ok - last word on MAC<>MODEM 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