From Zenitel Wiki

RTP Daemon is a Linux userspace program running in the background (daemon mode). It handles sending and receiving of RTP packet streams. It is controlled by AMCD.

  • Rtpdaemon handles transmission, reception and formatting of RTP packets.
  • Rtpdaemon formats and decodes RTP headers.
  • Rtpdaemon does not encode/decode the audio samples it self. Sample encode/decode is done in the DSP.
  • Rtpdaemon buffers received RTP packets, and a jitter-buffer algorithm sends chunks of samples to the DSP for decoding.
  • Rtpdaemon is implemented as a single-threaded program.