[3844] in Athena Bugs
Re: VS3100 modems
daemon@ATHENA.MIT.EDU (epeisach@ATHENA.MIT.EDU)
Mon Dec 18 14:22:16 1989
From: epeisach@ATHENA.MIT.EDU
Date: Mon, 18 Dec 89 14:21:44 -0500
To: bugs@ATHENA.MIT.EDU
Cc: hoffmann@ATHENA.MIT.EDU
Subject: Re: Attaching a modem to a VAXstation 3100
Message-ID: <2272@sactoh0.UUCP>
Date: 17 Dec 89 09:55:32 GMT
References: <3595@mit-caf.MIT.EDU>
Reply-To: robino@sactoh0.UUCP (John W. Robino)
Distribution: na
Organization: SAC-UNIX, Sacramento, Ca.
Lines: 45
In article <3595@mit-caf.MIT.EDU> ct@caf.mit.edu (Curtis Tsai) writes:
>I'm experiencing problems with hooking a modem up to a VAXstation 3100
>Model 30 to allow dialups.
>
> tty02 "/etc/getty H2400" dialup on modem
>
>to always on but that did not work either.
>
>Am I doing something wrong? I would like to use a cheaper modem but
>if it can't be done, will I have to purchase a DF242 Scholar Plus
>modem at $709?
>
The DF242 won't do any more for you than any other modem.
Problem here is that the VS3100 doesn't support full modem
control on either port.
tty03 has DTR set high all the time which your modem might want
to see. BTW, neither port looks at DSR.
If u can set DTR high on the modem, do so. That ensures that it
will always answer the phone.
Real trick here is not to tell your machine that it's a modem
port. That's because modem signals aren't much supported. Pretend
it's a direct connect terminal (but keep using the same cable) and
it should work ok.
The problem with keeping DTR high all the time is that you're not
going to be able to control hangup and session ends. But you're
not going to be able to control DTR in any case because you can't
tell your machine you have a modem. Therefore, users will have to
be sure to hang up the phone after they finish a session.
Pretty garbled answer but u probably get the idea.
-robino
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