Voice Activity Detection (VAD)

Most IP-based Telephony systems include a voice activity detector.

The purpose of the detector is to detect silence periods in the voice signal and temporarily discontinue transmission of the signal during the silence period. This saves bandwidth and allows the far-end to adjust its jitter-buffer.

Tune VAD Parameters
  • music-threshold (Default value is -38dBm)
  • voice vad-time (Default value is 250 msec)
Turn VAD off
  • no vad command under the VoIP dial-peers