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From: sirkm@ssyx.ucsc.edu (Greg Anderson)
Newsgroups: comp.sys.mac.programmer
Subject: Reading the carrier detect line on a modem.
Message-ID: <8338@saturn.ucsc.edu>
Date: 12 Jul 89 16:18:52 GMT
Sender: usenet@saturn.ucsc.edu
Reply-To: sirkm@ssyx.ucsc.edu (Greg Anderson)
Organization: UC Santa Cruz; Division of Social Sciences
Lines: 15

I would like to be able to tell when my modem drops carrier, preferably
without constantly monitoring the serial line for the string "NO CARRIER".
:+)

A casual inspection of Inside Macintosh didn't get me any information
about reading the carrier detect line; in fact, it appears that the
Macintosh serial port doesn't HAVE a carrier detect line.

Any information on this subject would be appreciated--even if the only
answer is "it can't be done".

     ___\    /___               Greg Anderson              ___\    /___ 
     \   \  /   /         Social Sciences Computing        \   \  /   /
      \  /\/\  /    University of California, Santa Cruz    \  /\/\  /
       \/    \/              sirkm@ssyx.ucsc.edu             \/    \/