Path: utzoo!utgpu!water!watmath!clyde!bellcore!tness7!ninja!dalsqnt!rpp386!jfh
From: jfh@rpp386.UUCP (John F. Haugh II)
Newsgroups: pubnet.sysops,comp.unix.xenix
Subject: Re: modem answering at wrong speed
Keywords: modems 2400 1200 Xenix getty line speeds
Message-ID: <4334@rpp386.UUCP>
Date: 23 Jul 88 09:00:19 GMT
References: <273@mjbtn.UUCP>
Reply-To: jfh@rpp386.UUCP (The Beach Bum)
Organization: Big "D" Home for Wayward Hackers
Lines: 44

In article <273@mjbtn.UUCP> root@mjbtn.UUCP (Mark J. Bailey) writes:
>Hello,
>
>I am having an annoying problem that some of you may have also experienced.
>
>I have 1) Mitsuba 2400 Internal Hayes compat. modem and 2) Prometheus 2400P
>External Modem and my Tandy 4000 '386 system running SCO Xenix 2.2.2.  I have
>my modems set to answer at 2400 baud and then cycle to 1200 on a CR and then
>back to 2400.  They are supposed to reset to 2400 baud at logoff, aren't 
>they?  Well, what is happening is that on initial setup, they answer the 
>first calls just fine, and then when the user logs off, they answer the 
>next call properly at 2400 baud ... sometimes.  At other times, they seems
>to get "stuck" in a 1200 baud mode, and that is where they stay, regardless
>of getty sending at 2400 (supposedly), they still answer at 1200 baud.

this seems to be a very common problem with 2400 baud hayes compatible
modems, hence the posting.

the problem arises whenever a connection is received at 1200 baud and
the modem is not reset.  some of the modems have a setting which allows
the modem to be reset whenever DTR drops.  i'm unfortunate enough to not
fall in that catagory, so i know of what i speak ;-(

if you modem does not have a command option to reset the modem on hangup,
and you are equally unfortunate to have the 1200 baud problem, there is
nothing you can do outside of resetting the modem on each hangup.

the simple fix is to write a wrapper around getty and have it reset
the modem on each invocation.  just a word to the wise, you have to
fork a child to do the actual talking to the tty port because the
process group will get messed up.  not enough room to explain it here,
just trust me.

if you are unfortunate enough to be stuck with micropoor unix and its
perverse getty, you are in real trouble.  i understand installing your
own version of getty is very difficult.  you know what they say, "surf
sco or go home" (sorry eric)

- john.
-- 
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