Twinkle (software)
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Twinkle is a free and open-source application for voice communications over Voice over IP (VoIP) protocol.
Twinkle is a free and open-source application for voice communications over Voice over IP (VoIP) protocol. ==Architecture== It is designed for Linux operating systems and uses the Qt toolkit for its graphical user interface. For call signaling it employs the Session Initiation Protocol (SIP). It also features direct IP-to-IP calls. Media streams are transmitted via the Real-time Transport Protocol (RTP) which may be encrypted with the Secure Real-time Transport Protocol (SRTP) and the ZRTP security protocols. Since version 1.3.2 (September 2008), Twinkle supports message exchange and a buddy-list feature for presence notification, showing the online-status of predefined communications partners (provider-support needed). ==Supported audio formats== G.711 A-law: 64 kbit/s payload, 8 kHz sampling rate G.711 μ-law: 64 kbit/s payload, 8 kHz sampling rate G.726: 16, 24, 32 or 40 kbit/s payload, 8 kHz sampling rate GSM: 13 kbit/s payload, 8 kHz sampling rate G.729: 8 kbit/s payload, 8 kHz sampling rate iLBC: 13.3 or 15.2 kbit/s payload, 8 kHz sampling rate Speex narrow band: 15.2 kbit/s payload, 8 kHz sampling rate Speex wide band: 28 kbit/s payload, 16 kHz sampling rate Speex ultra wide band: 36 kbit/s payload, 32 kHz sampling rate ==See also== Comparison of VoIP software List of SIP software List of free and open-source software packages Opportunistic encryption ==References==
Text derived from https://en.wikipedia.org/w/index.php?oldid=1329887142 under CC BY-SA 4.0; modifications have been made.