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.
- 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.
- 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
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.
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