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From: TOMIII@MTUS5.BITNET (Thomas Dwyer III)
Newsgroups: comp.os.msdos.programmer
Subject: Re: How to hang up modem line?
Message-ID: <90322.033011TOMIII@MTUS5.BITNET>
Date: 18 Nov 90 08:30:11 GMT
References: <11744@spool.cs.wisc.edu> <5750@uqcspe.cs.uq.oz.au>
Organization: Computing Technology Services, Michigan Technological Univ.
Lines: 14

Gee...I can't figure out a nifty-neato way of including the relavent
part(s) of previous posting(s).  Anyway, about hanging up the modem -
The reason +++ATZ doesn't work is because there must be a delay both
before and after the +++.  The delay is specified by an S register (sorry,
I don't have my modem manual here so I don't remember which) usually a
second will do.  As for dropping DTR, this only works if the switches
on the modem are set to "FOLLOW DTR" ie - they must not force DTR on.
Many modems also have software commands to follow/ignore the DTR signal.

Regards,
Thomas Dwyer III                        Email: tomiii@mtu.edu
Network Programmer                             tomiii@mtus5.BITNET
Computing Technology Services           Voice: (906) 487-2110
Michigan Technological University       Fax:   (906) 487-2787