stupid modem init question

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Hi,
Somewhat unrelated with mgetty, but  related with serial i/o is a question  i
have, as far as SCO OpenServer is concerned, is that is there any serial driver
support for detecting if the "carrier" has been "dropped" or not.

Like Gert said, if dropping the DTR messes up a serial port on SCO, what else
is there to forcefully terminate a data connection when the +++ATH fails to
get the attention of the modem ?

I have not got any satisfactory answers from sco re this, so if there is someone
out there who's handled this before, i would be grateful to know about it.

Thanks, Prasad Khandkar.

Gert Doering wrote:

> Hi,
>
> On Thu, Nov 12, 1998 at 02:51:59PM -0800, Devin Redlich wrote:
> > on SCO OpenServer V, I have the following, simple inittab entry:
> >
> > f01:2:respawn:/usr/local/sbin/mgetty tty1A
> [..]
> > 11/12 14:38:08 y1A  lowering DTR to reset Modem
>
> Try "toggle-dtr no".  This is somewhat "shooting in the dark", but
> someone told me that the SCO serial drivers mess up the port if DTR
> is dropped.
>
> If that doesn't work, let's go on searching...
>
> Can you access the modem with "cu -l tty1A" (set up the port in
> /usr/lib/uucp/Devices as "Direct..." first)?  If that doesn't work
> either, you might want to try a different serial port / cable / modem
> / computer, to locate the problem.
>
> gert
> --
> USENET is *not* the non-clickable part of WWW!
>                                                            //www.muc.de/~gert/
> Gert Doering - Munich, Germany                             gert@greenie.muc.de
> fax: +49-89-35655025                        gert.doering@physik.tu-muenchen.de