Path: utzoo!utgpu!watmath!uunet!xanth!nic.MR.NET!hal!cwjcc!tut.cis.ohio-state.edu!mailrus!rutgers!bpa!manta!cgh!amanue!pitt!anthony
From: anthony@pitt.UUCP (M. Anthony Kapolka 3)
Newsgroups: unix-pc.general
Subject: Need tty000 modem help
Message-ID: <4242@pitt.UUCP>
Date: 9 Nov 88 06:16:50 GMT
Reply-To: anthony@pitt.UUCP (M. Anthony Kapolka 3)
Distribution: na
Organization: Univ. of Pittsburgh Computer Science
Lines: 40


Help!

I am trying to hook up a Hayes-clone 2400 baud modem to tty000, with
(very) limited success.  I just want to set it up for dial-in...

I have it physically connected, and can dial out without problems.

When I set it up (via /etc/inittab) with a getty, everything seems fine.
When someone calls in, however, the modem picks up the phone and then
promptly hangs up on the caller.

If the modem receives a call without being connected to tty000 (ie the
serial cable unplugged) it answers just fine.  If I then plug in the
cable (with a getty sitting on the port) everything then works.
(Gosh, maybe all I need is a trained monkey!)

From this I take it that the port sends something to the modem which
causes it to hang up... but it has got to be something besides toggling
DTR because...

I have tried various combinations of wiring schemes, and this happens 
even with a simple 1->1, 2->2, 3->3, 7->7 and 8 connected to 20 on the
tty000 side.  I've also tried combinations of having the modem ignore/
pay attention to the DTR and CD lines for a more robust cable (all pins
straight though connected.)  Still, this odd behavior.

Any help would be appreciated... I don't have a break out box and this
has just gotten too strange for me.  Surely someone else has had this 
problem.

Oh, I am running version 3.0 of the OS.  Please don't tell me that is
my problem!

Also, does anybody out there have an auto-bauding getty working?

Thanks in advance,

Anthony Kapolka
anthony@vax.cs.pittsburgh.edu  ...{nfsun,idis,bacchus,prapc2}!eklektik!anthony