[Asterisk-Users] anyone doing voice audio detect VAD on analog lines

[Jerry Geis]

I am trying to use digium TDM04B type cards combined with call
files like:

Channel: Zap/1/5551212
Context: smvoice-dialout
Extension: 99999
Application: Playback
Data: demo-congrats

To call out and play messages. My problem is as soon as the phone is dialed
the message demo-congrats starts playing even though the called person 
has not
answered the phone yet... This does not happen on a T1 as
it has signalling indicating the call was answered...

I am looking for a solution that does this in asterisk for analog lines.

I used to use old dialogic D41PCI cards that had call progress analysis.

I have played with the /etc/asterisk/zapata.conf "callprogress=yes" setting
but have not had any luck. Also the comments say its HIGHLY EXPERIMENTAL.

Has anyone found a good way to do this and can you share?

THanks,

Jerry