Linphone features | Linphone, an open-source video sip phone

Linphone features

Core features

• SIP user agent compliant with RFC3261
• Decoupling between liblinphone engine and graphical UI: allows to integrate linphone functionnalities in any graphical application.
• Audio with the following codecs: speex (narrow band and wideband), G711 (ulaw,alaw), GSM. Through additionals plugins, it also supports AMR and iLBC.
• Video with codecs: H263, H263-1998, MPEG4, theora and H264 (thanks to a plugin based on x264), with resolutions from QCIF(176x144) to SVGA(800x600) provided that network bandwidth and cpu power are sufficient.
• Supports IPv6
• Supports any webcam with a V4L or V4L2 driver under linux and Directshow driver on windows
• Text instant messaging and presence (using the SIMPLE standart)
• Addressbook
• DTMF (telephone tones) support using SIP INFO or RFC2833
• Understands SIP ENUMS (sip phone numbers using the naptr DNS service, without proxy)
• Echo cancelation using the great speex echo canceler
• Multiple SIP proxy support: registrar, proxies, outbound proxies
• Digest authentication
• Nat friendly: guesses NAT address for SIP messages, uses STUN for RTP streams
• Sound backends: 
  • Linux: ALSA, OSS, PulseAudio
  • Windows: waveapi
  • MacOSX: audio queues
  • iPhone: AudioUnit
  • Android sound system
• Efficient bandwidth management: the bandwidth limitations are signaled using SDP (b=AS...), resulting in audio and video session established with bitrates that fits the user's network capabilities.
• Can use plugins: to add new codecs, or new core functionalities, such as remote directory search of sip addresses for example.
• Compliant with open standarts: see the full list there.

User interfaces

Gtk2 graphical interface

It is running for Linux, Windows and MacOSX

Console tools

• Linphonec is a command line interface that can use readline on linux to get completion, history, such as bash.
• Linphonecsh is another command line tool to remotely control a linphonec daemon. Unlike linphonec, linphonecsh immediately exits once the command is executed.

Mobile phones interfaces

• Android application (no video support yet)
• iPhone application (no video support yet)

Portability

• Linux/x86 and Linux/x86-64
• Windows XP and Vista
• Linux/ARM: without graphical interface. Linphonec or liblinphone are good candidates to provide the software stack of an hardware phone or hardware communication system.
• Linux/Blackfin: The uclinux.org project maintains a port of linphone for blackfin processors, without gui. Performance are impressive. See here for details.
• MacOS X x86 : audio only version for now. Linphone is integrated in macports.
• Google Android: audio only version, download with the Android Market from your phone.
• Iphone OS: audio only version, download from the AppStore on your iphone or ipod touch.
• May work also on FreeBSD and OpenBSD with minor modifications to the build system.

Go there...
http://www.linphone.org/eng/features/

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Linphone features | Linphone, an open-source video sip phone

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