From owner-freebsd-questions  Tue Jun 10 11:11:56 1997
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Date: Tue, 10 Jun 1997 15:15:02 +0000 ()
From: "Lenzi, Sergio" <lenzi@bsi.com.br>
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To: Jason McKay <jasonm@homer.argo.net.au>
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Subject: Re: Disconnecting for FreeBSD
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On Tue, 10 Jun 1997, Jason McKay wrote:

> When a dial-up user types "exit" to logoff, it only returns them to the
> login prompt.  How do we make FreeBSD hang up the modem once 'exit' is
> entered?
Hello Jason..

solution:

Make sure your modem has a cable with pin 20 (modem side) controlled by the
FreeBSD and your modem configure to disconnect when DTR (pin 20) is low.

On a hayes compatible modem... command AT&d1 is what you need
take a look also on the dtr override dip switch configuration (if any) on 
the modem.

Sergio Lenzi.

Unix consult.