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Jitsi

Jitsi
Logo Jitsi.svg
Original author(s)Emil Ivov
Developer(s)Jitsi Team and Contributors
Initial release2003 (2003)
Stable release2.0 (build.4506) (March 6, 2013; 18 days ago (2013-03-06)) [±] [±]
Preview release2.1 (nightly) [±] [±]
Development statusActive
Written inJava
Operating systemLinux, Mac OS X, Windows (all Java supported)
Size33 MB – Windows[1]
23 MB – Mac OS X[2]
16 MB – GNU/Linux
60 MB – source code[3]
Available inEnglish, French, German, Bulgarian, Japanese, Spanish, Italian, Romanian, Greek
TypeVoice over Internet Protocol / instant messaging / videoconferencing
LicenseLGPL
Websitejitsi.org

Jitsi (formerly SIP Communicator) is a VoIP, videoconferencing and instant messaging application for Windows, Linux and Mac OS X. It supports several popular instant messaging and telephony protocols. Released under the terms of the LGPL, Jitsi is free and open source software.[4]

Contents

Features

Jitsi's conference call window on Mac OS X

Jitsi supports multiple operating systems, including Windows as well as Unix-like systems such as Linux, Mac OS X and BSD. An Android version is planned for early 2013.[5] It also includes:[6]

  • Attended and blind call transfer
  • Auto away
  • Auto re-connect
  • Auto answer and Auto Forward
  • Call recording
  • Call encryption with SRTP and ZRTP
  • Conference calls
  • Direct media connection establishment with the ICE protocol
  • Desktop Streaming
  • Encrypted password storage using a master password
  • File transfer for XMPP, AIM/ICQ, Windows Live Messenger, YIM
  • Instant messaging encryption with OTR
  • IPv6 support for SIP and XMPP
  • Media relaying with the TURN protocol
  • Message Waiting Indication (RFC 3842)
  • Voice and video calls for SIP and XMPP using H.264 and H.263 or VP8[7] for video encoding
  • Wideband audio with SILK, G.722 , Speex and Opus[7]
  • DTMF support with SIP INFO, RTP (RFC 2833/RFC 4733), In-band
  • Zeroconf via mDNS/DNS-SD (à la Apple's Bonjour)
  • DNSSEC
  • group video support group video support (videobridge)[8]

Supported protocols

The following protocols are currently supported by Jitsi:[4]

Technologies

Jitsi is mostly written in Java[9] which helps reuse most of the same code over the various operating systems it works on. Its GUI is based upon Swing. The project also uses native code for the implementation of platform specific tasks such audio/video capture and rendering, IP address selection, and access to native popup notification systems such as Growl.

The project uses the Apache Felix OSGi implementation[10] for modularity.

Among others Jitsi uses the JAIN-SIP protocol stack for SIP support and the Jive Software Smack library [11] for XMPP.[12]

The fact that Jitsi properly handles IPv6 is especially interesting for direct PC-to-PC (peer-to-peer) communication, for instance, if both sides are 'trapped' behind NAT routers, but obtain a reachable IPv6 address via a tunnel-broker.

The Jitsi community has also completed an ICE implementation called ice4j.org, which it uses to provide NAT traversal capabilities, and assist IPv4 to IPv6 transition.[13]

History

Work on Jitsi (then SIP Communicator) started in 2003 in the context of a student project by Emil Ivov at the University of Strasbourg.[14] It was originally released as an example video phone in the JAIN-SIP stack and later spun off as a standalone project.[15]

Originally the project was mostly used as an experimentation tool because of its support for IPv6.[16][17] Through the years, as the project gathered members, it also added support for protocols other than SIP.

Jitsi has received support from various institutions such as the NLnet Foundation,[18][19] the University of Strasbourg and the Region of Alsace[20] and it has also had multiple participations in the Google Summer of Code program.[21][22]

In 2009, Emil Ivov founded the BlueJimp company which has employed some of Jitsi's main contributors[23][24] in order to offer professional support and development services[25] related to the project.

In 2011, after successfully adding support for Audio/Video communication over XMPP’s Jingle extensions, the project was renamed to Jitsi since it was no longer "a SIP only Communicator".[26][27] This name originates from the Bulgarian: Жици (wires).[28]

Some developers of Jitsi work[29] for BlueJimp who give professional support for Jitsi.[30]

See also

Portal iconFree software portal

References

  1. ^ https://download.jitsi.org/jitsi/wind ows/
  2. ^ https://download.jitsi.org/jitsi/maco sx/
  3. ^ https://download.jitsi.org/jitsi/src/
  4. ^ a b Jitsi home page
  5. ^ Jitsi FAQ
  6. ^ Jitsi feature list with information on supported protocols
  7. ^ a b https://download.jitsi.org/jitsi/chan gelogs/changelog-4506.html
  8. ^ https://jitsi.org/Main/News
  9. ^ Ohloh.net page for Jitsi
  10. ^ Projects using Felix
  11. ^ Smack library
  12. ^ Jitsi team and contributors page with information on used libraries
  13. ^ ice4j.org home page
  14. ^ SIP Communicator: Interview with Emil Ivov
  15. ^ http://java.net/nonav/projects/jitsi/ lists/dev/archive/2003-06/message/1 Original Jitsi release announcement
  16. ^ Optimizing SIP Application Layer Mobility over IPv6 Using Layer 2 Triggers
  17. ^ NEMO Basic Support, Multi-Domiciliation et Découverte de Services
  18. ^ NLnet; SIP Comm Phone
  19. ^ NLnet; SIP Comm Desktop
  20. ^ La région récompense un jeune informaticien
  21. ^ SIP Communicator GSoC'10 home page
  22. ^ SIP Communicator GSoC'09 home page
  23. ^ Jitsi Contributors - Ohloh at the Wayback Machine (archived March 26, 2010)
  24. ^ Jitsi Team and Contributors
  25. ^ BlueJimp | Main / Solutions
  26. ^ About Jitsi
  27. ^ Renaming to Jitsi. Step 1: The Site
  28. ^ Jitsi (SIP Communicator) | Documentation / FAQ § How do you spell Jitsi and what does it mean?
  29. ^ https://jitsi.org/index.php/Developme nt/TeamAndContributors
  30. ^ http://bluejimp.com/index.php/Main/Ab out

External links

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