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Path: utzoo!mnetor!seismo!uwvax!oddjob!gargoyle!ihnp4!chinet!randy
From: randy@chinet.UUCP (Randy Suess)
Newsgroups: comp.unix.questions
Subject: Re: 3b2 Specific Question (uugetty)
Message-ID: <1092@chinet.UUCP>
Date: Mon, 1-Jun-87 11:15:33 EDT
Article-I.D.: chinet.1092
Posted: Mon Jun  1 11:15:33 1987
Date-Received: Wed, 3-Jun-87 01:13:55 EDT
References: <3192@well.UUCP>
Reply-To: randy@chinet.UUCP (Randy Suess)
Distribution: na
Organization: Chinet - Public Access Unix
Lines: 24

In article <3192@well.UUCP> kdavis@well.UUCP (Ken Davis) writes:
>Have any of you folks out there with at 3b2-300 been able
>to configure a Hayes smartmodem bi-directional and use
>uugetty?  

	This was discussed at length a year or so ago.  Seems a smart
modem like the Hayes and uugetty on a 3b2 are incompatible.
The 3b2 tty drivers require CD (pin 8) to be hi on the modem for
it to send the dial codes.  But if you set CD to be hi all the time
on the modem, then the 3b2 has no way of knowing when the calling
(inbound) party has hung up, and so the next caller on that line 
is now in on the same session.
	On chinet, I solved the problem (I use USRobotics Couriers) by
building a little black box that sits between the modem and port.
It uses a couple of edge triggerd timers to toggle the CD line down
and back up on all incoming and outgoing calls.  This has worked
fine for over 2 years.

-randy

-- 
that's the biz, sweetheart.....
Randy Suess
..!ihnp4!chinet!randy