On Tue, 8 Dec 1998, Andy Kunz wrote:

> >    Reset DTR and RTS lines to low
>
> This will disconnect and hang up the phone for you.  I use this method to
> disconnect undesired users as a security option.

Note: This only works if the modem is initialized to hangup on dropped
DTR. There is a '&' - Hayes command to be sent to achieve this. Most
modems come preconfigured to do this. Note that most Unix *gettys will
choke on a modem that hasn't got this feature enabled.

Peter