Jami – free and universal communication platform

Jami (formerly GNU Ring and SFLphone) is an open source SIP-compatible softphone and SIP-based instant messenger for Linux, Microsoft Windows, Mac OS X and Android.

With this software you can make calls, create conferences with multiple participants, share media, send text messages during calls or out of calls.

Ring is also designed as a building block for IoT projects.

Features include:

  • SIP-compatible with OpenDHT support.
  • Unlimited number of calls.
  • Instant messaging.
  • Searchable call history.
  • Call recording.
  • Attended call transfer.
  • Automatic call answering.
  • Call holding.
  • Audio and video calls with multi-party audio and experimentally video conferencing.
  • Multi-channel audio support (experimental).
  • Streaming of video and audio files during a call.
  • TLS and SRTP support.
  • Multiple audio codecs supported: G711u, G711a, GSM, Speex (8, 16, 32 kHz), Opus, G.722 (silence detection supported with Speex).
  • Multiple SIP accounts support, with per-account STUN support and SIP presence subscription.
  • DTMF support.
  • Automatic Gain Control.
  • Account assistant wizard.
  • Global keyboard shortcuts.
  • Flac and Vorbis ringtone support.
  • Desktop notification: voicemail number, incoming call, information messages.
  • SIP Re-invite.
  • Address book integration in GNOME and KDE.
  • PulseAudio support.
  • Jack Audio Connection Kit support.
  • Automatic opening of incoming URL.
  • Decentralized.
  • End-to-end encryption with authentication used for chat, video and voice.
  • Identity managed by X.509 certificates.
  • Based on RSA/AES/DTLS/SRTP technologies.
  • Official packages for Debian, Fedora, and Ubuntu. Other Linux distributions are also supported.
  • Internationalization support – French, English, Russian, German, Chinese, Spanish, Italian, and Vietnamese

Website: jami.net
Support: Blog
Developer: Savoir-faire Linux
License: GNU General Public License v3.0 or later

Jami software relies on various components which interact together. They are divided into four layers.

  • LibRingClient – facilitates clients’ portability between operating systems.
  • D-BUS – enables communication between LibRingClient and LibRing.
  • LibRing – involved in all commands.
  • Four external libraries:
    • OpenDHT – a lightweight C++11 Distributed Hash Table implementation.
    • PJSIP – the open SIP protocol.
    • GNU TLS – a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them.
    • LibAV FFMPEG – codecs for compressing and decompressing it during the transport.


Jami is written in C and C++. Learn C with our recommended free books and free tutorials. Learn C++ with our recommended free books and free tutorials.

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