How to make serial line with modem work?

[Jeremy Webber]

I have a Personal Iris, with a Hayes compatible modem attached to serial line
2.  I have written a program which resets the modem (using ATZ), sets up some
parameters, including the hangup-when-DTR-dropped state, then dials up a remote
computer, finally establishing an SL/IP connection to it.

All works well, using port /dev/ttyd2, except if the remote computer hangs up
the line.  The sliplogin program on this end does not appear to receive a
HANGUP signal.

I cannot use /dev/ttym2 because it won't allow itself to be opened until DCD is
asserted, and this does not happen until the remote dialup is complete.  I
can't establish the session with /dev/ttyd2, then close it and open /dev/ttym2,
because that would cause my modem to hang up, which I want to happen (this is
how the connection is terminated at my end).

Have I missed something?  How should I be doing this?

		-jeremy

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Jeremy Webber			   ACSnet: jeremy at chook.ua.oz
Digital Arts Film and Television,  Internet: jeremy at chook.ua.oz.au
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