I assume you are going to detect the answering of the call somehow external
to the modem?  One suggestion I would have is to append a semicolon (I
think - Check your modem manual) to the dial string because it will return
it to command mode after dialing, so that you can then send another ATDT
command once you have detected the call being answered.  If you don't, then
the next character you send to the modem will cause the modem to hang up
unless it has already received carrier.

-Steve

----- Original Message -----
From: Duilio Foschi <foschid@SHUTTLE.ETRURIA.NET>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Sunday, October 24, 1999 2:56 PM
Subject: send DTMF tones


> 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