Path: utzoo!yunexus!ists!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!tut.cis.ohio-state.edu!ucbvax!hplabs!hpfcso!hpldola!paul
From: paul@hpldola.HP.COM (Paul Bame)
Newsgroups: comp.dcom.modems
Subject: Re: Hayes Personal Modem 2400 questions
Message-ID: <11330001@hpldola.HP.COM>
Date: 14 Nov 89 23:41:17 GMT
Article-I.D.: hpldola.11330001
References: <18882@pasteur.Berkeley.EDU>
Organization: HP Elec. Design Div. -ColoSpgs
Lines: 14

How about the modem control lines (DTR, DSR, CARDET) on the Hayes
Personal 2400?  There are no technical docs but a quick look with
a voltmeter shows CARDET always asserted and the modem doesn't
hang up when DTR(pin 20 on the DB25) is brought low.  Both of these 
behaviors were good reasons to use a Hayes 1200 as a dial-in/dial-out 
Unix modem.  Is there a way to enable intelligent use of these signals?

Thanks!  Please respond by e-mail if possible as I may not get 
around to here for a while.

	-Paul Bame 
	paul@hpldola.hp.com
	uunet!prisma!hp-lsd!paul
	719 590 5557