Speech Recognition with Telephone

I need to detect the user voice when they pick-up the reciever on the other end. Because Modems usually start playing files (playback terminal) when the first ring goes there. So I planned to use speech recognition when they say "hello", it can start play the file until wait for playing file. Or even any noise interference it can start speak. I have a code that can recognize the wav file but i'm struggling to add with my telephone application . I'm using Tapi Manager from C4F for making the calls. The calling is perfect but how shall I add it with my application???

Any link 开发者_如何学Goor help that will give or guide how can we integrate the 2 applications????

I think you'd have better luck listening for a busy signal or waiting until ringing stops. What if they answer in another language? What if they don't say anything? What if it's an answering machine?