> Using an external modem, I need to do the following things:
>
> 1. dial a number
> 2. detect if the call is answered
> 3. send DTMF tones to the remote phone
>
> I can do 1. with the command ATDT...
> I can do 2. detecting when the ringback signal stops
>
> I don't know how to do 3.
>
> Any hint ?
>
> Thank you
>
> Duilio Foschi

http://www.dontronics.com/stamp.html#pager
should help you out

Don McKenzie  mailto:don@dontronics.com http://www.dontronics.com

Don's Download Dungeon:   http://www.dontronics.com/download.html
Australian Electronics Ring http://www.dontronics.com/aering.html
Win $500USD Cash. Micro design contest:  http://www.simmstick.com