Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!usc!cs.utexas.edu!uunet!murtoa.cs.mu.oz.au!munnari.oz.au!comp.vuw.ac.nz!windy!gpwd!gpwrdcs
From: GPWRDCS@gp.govt.nz (Don Stokes, GPO)
Newsgroups: comp.dcom.modems
Subject: Re: Modems for Minitel ( 1200/75bps )
Message-ID: <631@gp.govt.nz>
Date: 26 Jun 89 12:49:27 GMT
References: <762@sbsvax.UUCP> <874@maths.tcd.ie> <48@csnz.co.nz>
Organization: Government Printing Office, Wellington, New Zealand
Lines: 28

In article <48@csnz.co.nz>, paul@csnz.co.nz (Paul Gillingwater) writes:
>                                                                 However, a
> clever programmer here in New Zealand has written software that SIMULATES
> the 75 baud on the DTE by playing with DTR.  And it works!  

Just nit picking again (do I do anything else?), but SJ's little 1200/75 
ditty does not use DTR for back channel transmission - it uses DTR to
dial the modem and the break signal generation on the UART to generate
the 75bps channel - effectively lowering and raising the transmit line on
command.  The programs that use it (correct me if I'm wrong Paul) are: 

        DIAL    The original - pulse dials numbers using DTR and handles
                split speeds.  I'm not sure how this is used. 
        TARG    Comms program written around DIAL.
        HAYES   Hayes emulator for dumb modems, written by another local
                chap using DIAL's baudrate splitter and pulse-dialer.
                Sends responses for loss of carrier, connect etc. 
                Requires patches to comms software - patches exist for
                Procomm and Telix (I forget which versions). 

All these are for MS-DOS systems.

Don Stokes, Systems Programmer    /  /   Domain:                  don@gp.govt.nz
Government Printing Office,      /GP/   PSImail:          PSI%0530147000028::DON
Wellington, New Zealand         /  /   UUCP:  ...!munnari!vuwcomp!windy!gpwd!don
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