you deserve 5 stars ;) 

I am having the same problem and I checked the IP Voice Media Streaming detailed logs and found the below... 14:12:06.823 |   CANNAudio::GetAnnouncement() Ann(Alertingtone) AnnRingBack.wav(NW) AnnRingBack.wav(NW)14:12:06.823 |-->CANNAudio::isFileExis...