If I originate an outgoing call from FreeSwitch and want to tts a phrase or play an audio once the call has been answered (i.e, someone answered their cell phone or I got their voicemail) then how do I detect that.

Otherwise, I've tried the following but it relies in getting the timing right which won't always work or looping the tts phrase over and over.

var s;
while (tryCalling()) {}
s.hangup();
exit();

function tryCalling() {
    s = new Session("sofia/gateway/spa3102/12223334444@10.0.0.5:5061");
    s.waitForAnswer(10000);
   
    if (s.cause == "USER_BUSY") {
        return true;
    }

    if (s.ready()) {
        s.sleep(10000);
        s.speak("cepstral","Callie","Hello from FreeSwitch");
    }
    return false;
}


Another way is to keep replaying the tts phrase by replacing

  if (s.ready()) {
        s.sleep(10000);
        s.speak("cepstral","Callie","Hello from FreeSwitch");
    }

with something like:

 while (s.ready()) {
        s.speak("cepstral","Callie","Hello from FreeSwitch");
    }


Thanks. Mark.