This is a proprietary VoIP project to send and receive audio data by TCP. It's an extension of my first article Play or Capture Audio Sound. Send and Receive as Multicast (RTP). This application streams the audio data not by multicast but by TCP. So you can be sure there is no data lost and you can transfer them over subnets and routers away. The audio codec is U-Law. The sample rate is selectable from 5000 to 44100.