Imre,

>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.

this does exactly what I wanted.

Thanks a lot

Duilio

At 12.50 25/10/99 +0200, you wrote:
>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
>>
>>
>