Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83 (MC840302); site boring.UUCP Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!think!harvard!seismo!mcvax!boring!jack From: jack@boring.UUCP Newsgroups: net.dcom Subject: Re: autodial on synchronous modems Message-ID: <6483@boring.UUCP> Date: Fri, 28-Jun-85 13:00:30 EDT Article-I.D.: boring.6483 Posted: Fri Jun 28 13:00:30 1985 Date-Received: Sun, 30-Jun-85 00:20:06 EDT References: <413@enmasse.UUCP> Reply-To: jack@boring.UUCP (Jack Jansen) Distribution: net Organization: AMOEBA project, CWI, Amsterdam Lines: 23 Apparently-To: rnews@mcvax.LOCAL [Re: dialing by sending pulses to a certain pin on a modem] That's an old trick. What this in fact does is opening and closing the line fast (using DTR), since this is the same as the dial does. For anyone who is interested: I have a PDP-11 DL-11E driver that uses this trick to do dial-out on one of those pre-historic ASR-33 modems on machine 'htsa'. The driver is also intelligent about incoming and outgoing calls (which it can both handle). I haven't done any statistics, but the driver seems to get the correct number almost all the time (I never caught it dialing the wrong number, at 3 o'clock at night:-). If anyone is interested in the code (for V7 PDP-11, although it will probably port with adaptions for your device), I'll try to dig it cleanly out of the tty driver. -- Jack Jansen, jack@mcvax.UUCP The shell is my oyster.