Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!samsung!umich!sharkey!tygra!mich-ns!tech
From: tech@mich-ns.UUCP (Mich. Network Sys. TECH SUPPORT)
Newsgroups: comp.dcom.modems
Subject: Re: How do I *force* a hang-up (novice question)
Message-ID: <31@mich-ns.UUCP>
Date: 24 Apr 91 23:06:41 GMT
References: <5969@vela.acs.oakland.edu>
Reply-To: tech@mich-ns.UUCP
Organization: Michigan Network Systems, Detroit, MI
Lines: 27

In article <5969@vela.acs.oakland.edu> rdthomps@vela.acs.oakland.edu (Robert D. Thompson) writes:
"
"	I have written a communications client application, but I
"	am having trouble with a really basic problem.  That is,
"	sometimes, I cannot force a hang up.
"
"	I have tried "ATZ" (software reset) and "ATH0" and "ATH1" to
"	take the line of and on again.  Even after I issue these
"	commands I can pick up the phone and the line will still
"	be active (i.e. szszszszszszszszszsszszsz).
"
"	Any help would be appreciated
"---

The sure fire way to do it with both modems is to drop the DTR signal 
for about a second. The default settings on most modems will cause them
to hang up. For this you need to have access to routines which can access
the hardware in such a manner as to be able to drop the DTR signal and
then raise it again. On what kind of system is this installed?? What
developement environment did you use??  (ie: what language and compiler?)


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