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Linphone logo.png
Linphone android.png
Linphone running on Android
Original author(s) Belledonne Communications
Developer(s) Linphone
Stable release v3.7 (v2.1 for Android & iOS, v1.0.1 for Blackberry) / February 20, 2014; 54 days ago (2014-02-20)[1]
Written in C
Operating system Cross-platform[2]
Platform GNU/Linux, FreeBSD,[3] Windows, Mac OS, iPhone, Android, BlackBerry OS
Size 8–17 MB
Available in Multilingual
Type Voice over IP, instant messaging, videoconferencing
License GNU GPL version 2[4]

Linphone is a free VoIP application available on PCs running Linux, BSD operating systems such as FreeBSD,[3] Windows, or Mac OS X, and mobile phones running BlackBerry OS, Android[5] or iOS.[6] It uses the Session Initiation Protocol (SIP) for communication and is licensed under the GNU General Public License (GPL). It supports IPv6, encryption via Transport Layer Security (TLS) and can be used behind network address translator (NAT). Linphone uses GTK+ for GUI and on Linux it can be also run as a console-mode application. It is compatible with telephony by using an Internet telephony service provider (ITSP).

Linphone running on HTC Desire

Audio codecs[edit]

Audio codec support: Speex (narrow band and wideband), G.711 (µ-law, A-law), GSM, Opus, and iLBC (through an optional plugin)

Video codecs[edit]

Video codec support: H263-1998, MPEG-4, Theora and H.264 (with a plugin based on x264), with resolutions from QCIF(176×144) to SVGA(800×600) provided that network bandwidth and CPU power are sufficient.[2]

See also[edit]