greg at orthogony.com
Tue Nov 26 06:43:02 UTC 2002
You need a modem with "answer supervision." Most don't
have it since all they care about is a valid carrier.
You can get peripheral cards, though, designed for telephony
applications such as AVR that will have that feature. The
bus or AT-command protocol for answer detection depends
on the card.
What's done in some cases where answer supervision is not
available is that the terminal is inserted into the connection
after a preset duration . So that, for instance, 2 seconds after
the call is dialed, the extension is inserted and the caller
may have to listen to a few rings.
----- Original Message -----
From: "Peter Poulsen" <peter_poulsen at stofanet.dk>
To: <tuxcpprogramming at lists.linux.org.au>
Sent: Saturday, November 23, 2002 3:17 AM
> I'm trying to make a program where I have some ordinary phonenumbers in
> a database, and then uses my modem to dialup for me.
> My problem is that I have no idear how to detect that the receiver has
> picked up his phone. Anybody that knowns how to detect this.
> This is the Linux C++ Programming List
> : http://lists.linux.org.au/listinfo/tuxcpprogramming List
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