Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!purdue!decwrl!labrea!polya!kaufman From: kaufman@polya.Stanford.EDU (Marc T. Kaufman) Newsgroups: comp.dcom.modems Subject: Re: Solution to Problems with UUCP/modems. Keywords: modems ACU driver Message-ID: <4026@polya.Stanford.EDU> Date: 22 Sep 88 00:32:44 GMT References: <1260@moscom.UUCP> <324@mikros.systemware.de> Reply-To: kaufman@polya.Stanford.EDU (Marc T. Kaufman) Organization: Stanford University Lines: 14 In article <324@mikros.systemware.de> stefan@mikros.UUCP (Stefan Stapelberg) writes: >I would like to implement this scheme, but controlling the >DTR signal from the modem turns out to be a problem: The modem >doesn't answer rings if DTR has not been asserted by the opening >process. Unfortunately, I have to use DTR to hangup the modem >after dialing out. The Bell-compatible modem spec says that to hang up a modem, you drop DTR and hold it down until CD goes away... but you do not have to hold it down more than 250 milliseconds. Can you just pulse DTR down (to hang up) then back up? Marc Kaufman (kaufman@polya.stanford.edu)