Twinkle (software)

Infobox Software
name = Twinkle



caption =
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author =
developer = Michel de Boer
released = 27 April 2005
latest preview version =
latest preview date =
frequently updated = yes
programming language = Qt 3
operating system = Linux
platform =
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genre = VoIP
license = GPL
website = [http://www.twinklephone.com twinklephone.com]

Twinkle is a free software/open source VoIP softphone application for Linux. It uses the SIP protocol. It also incorporates a GPL implementation of the ZRTP and SRTP security protocols and MD5 digest authentication.

The latest version (1.3.2, September 08) also supports message-exchange and a buddy-list, showing the online-status of predefined SIP-partners (provider-support needed)

Audio codecs supported

* 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)
* 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)

Source code

For using encrypted telephony it is (now, Aug 07) advisable, to use the source-distribution. Compiling the source code is straight forward and painless, at least on Debian-based Linux-systems.

See also

* Comparison of VoIP software

*Opportunistic encryption

External links

* [http://www.twinklephone.com/ Twinklephone Website]