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From: duke@gitpyr.gatech.EDU (Roy Brabson)
Newsgroups: comp.dcom.modems
Subject: Hayes 1200 and Busy Signal Detection
Message-ID: <3521@gitpyr.gatech.EDU>
Date: Sat, 2-May-87 20:10:11 EDT
Article-I.D.: gitpyr.3521
Posted: Sat May  2 20:10:11 1987
Date-Received: Sun, 3-May-87 08:07:48 EDT
Organization: Georgia Institute of Technology
Lines: 7
Keywords: Busy signal detection


I am assuming all Hayes 1200's support all the features that mine does;
it is possible that older ones do not support busy signal detection.
The way I have mine check for this is by placing "X4" in my modem 
initialization string.  This allows the modem to detect both a dial tone
and a busy signal.  Like I said, maybe your Hayes doesn't support this, but
mine does.