[Freeswitch-users] Answering machine detection

[tuhl at ix.netcom.com]

I checked the wiki and the archive and couldn't find anything along 
these lines.... I have an application which will call a list of 
numbers and play a .wav file (basic JS code below). It starts playing 
the .wav file 1s after the user answers. This works, unless my app 
calls an answering machine (like a POTS one at home, or my cellphone 
voice mail). I need a way to determine that some audio greeting is 
being played back to me from the remote end (more than just a live 
human saying "Hello"), ignore it, then wait for the 'beep' tone when 
the answering machine starts recording, and then start playing my 
.wav file. Does anyone know if that tone is a standard tone? Is it 
DTMF so that teletone can detect it, or is it something else (it 
sounds like a single tone to me, not dual-tone). Will every answering 
machine/voice mail system in the world generate the same tone?

   session.originate(target,target);
   session.waitForAnswer(30000);
   session.execute("sleep","1000");
   session.streamFile( AudioFile, "","");

Thanks,
Tom



===============
tuhl at ix.netcom.com