[Asterisk-Dev] Answer Supervision for incoming calls in Asterisk

[Kevin P. Fleming]

Fernando Romo wrote:

> Asterisk can handle this schema? with Answer app? if i put a "Playback" 
> sound and the "answer" apps in  the dial plan is enough for this 
> purposes? in my test the asterisk inmediate answer the line and send the 
> "answer supervision" bits inmidiatly.

This is a -users question, not a -dev question.

Yes, the Playback() app can be told to play the sound file _without_ 
answering the line first. Once that is done (and a suitable time period 
has elapsed), the Answer() app will actually answer the line and begin 
billing (both within Asterisk and on the telco side).

Note that before you have answered the line you cannot _receive_ any 
audio or DTMF from the caller, so presumably your message will just tell 
them they have some amount of time to hang up before billing starts.