Hi,

normally, to do this, you should close the dialing ATDT command with a ;
(semicolon). Then, the modem will return, and to send DTMF tones you can
emit as many ATDT commands of that fashion as you will.

Regards,
Imre

On Sun, 24 Oct 1999, Duilio Foschi wrote:

> 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
>
>