VDK Technical Features

Version 1.1.0 includes all the main engineering technicalities needed to develop new, high quality, convergent telecommunications services in an extremely easy and rapid way. Upcoming features are described in the Roadmap page.

General Features:

  • Cross-Platform (Windows, Linux, MacOSX)
  • Fully Asterisk compliant
  • Multi line conferencing
  • NAT Friendly


  • RFC 3261 compliant
  • Call Transfer
  • Call Hold
  • Do Not Disturb
  • Instant Messaging (Sip Message)
  • DTMF support (SIP Info, RFC 2833)
  • SIPS (SIP Secure)


  • G.711 ALaw
  • G.711 uLaw
  • G.729 (needs a separate license)
  • G.722
  • G.722.1
  • G.723.1
  • G.726
  • G.728
  • GSM
  • iLBC
  • Speex (Narrow, Wide and Ultra-Wide Band)
  • AMR (Narrow and Wide Band)

Audio features:

  • AGC
  • VAD
  • PLC
  • Adaptive dejitter buffer
  • Source audio from network connection, audio card, file
  • Source-independent multi-channel audio mixing
  • File recording of mixed audio
  • Supported files as audio source (play) WAV (GSM, G.711A/u, PCM)
  • Supported files for destination (record) WAV (GSM, G.711A/u, PCM)