Twinkle (software)

Not to be confused with Wikipedia:Twinkle.

Twinkle

Developer(s)	Michel de Boer, Luboš Doležel
Initial release	27 April 2005
Stable release	1.10.3 (February 19, 2022 (2022-02-19)) [±]
Written in	C++
Operating system	Linux
Platform	Qt
Type	VoIP
License	GPL-2.0-or-later

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