Here is an up-to-date list of features currently available in the latest stable release or upcoming, ordered by category.

Call features

  • Unlimited number of lines
  • Call history + search feature
  • Attended call transfer
  • Auto answer
  • Call hold
  • Call recording
  • Multi-way conferencing
  • Peer to peer calls
  • Video calls
  • Instant Messaging


  • SIP and IAX2 protocols support
  • DTMF support (SIP INFO, RTP)
  • Multiple accounts support
  • STUN support per account
  • SIP Re-invite
  • SIP Routes
  • SIP early media support


  • Pulseaudio support
  • Native ALSA interface, DMix support
  • High definition audio codecs: Opus, Speex 16000/32000, G722 + Standards (G711, GSM), G.729, iLBC
  • Audio device detection
  • Silence detection with speex audio codec
  • Linear 16 bit wave format support for ringtones
  • Ability to select an independent ringtone playback device


  • Support for H.264, H.263, VP8, MPEG-4 Video
  • Resolution/framerate selection


  • Voice encryption (SRTP)
  • ZRTP key exchange protocol
  • SDES key exchange protocol
  • Signalling encryption (TLS)
  • Multiple realms authentification mecanism


  • GNOME, KDE and python-cli clients available
  • X11 keyboard symbols integration (0.9.8)
  • Network Manager integration (0.9.8)
  • Account assistant wizard
  • Desktop notification
  • GNOME/KDE address book integration
  • Minimize on start-up
  • Minimize to tray


  • Automatic opening of incoming URL
  • Central server providing free SIP/IAX account
  • Locale settings: translated in 25+ languages
  • Configuration system based on YAML serialization format

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