The asterisk VoIP projct has a protocol built-in called “AudioSocket”. AudioSocket is built on top of TCP, streaming int16 values at a sample rate of 8 kHz, neither of those options are configurable (by design). AudioSocket will stream audio from the connected phone to the tcp server, and play audio samples sent from the tcp server to the phone. This documentation is a work in progress, and a result of source code spelunking or reverse engineering. It may contain errors or outright lies. ...
