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Twinkle is a software phone for voice over IP communications using the SIP protocol. You can use it for direct IP phone to IP phone communication, or in a network using a SIP proxy to route your calls. Some of the features offered are call waiting, call hold, 3-way conference call, call transfer, and call reject. It supports STUN or a statically configured public IP address for NAT traversal. When using STUN, it will send keep-alive packets to keep NAT bindings alive. It supports ZRTP for secure voice communication.
License: GNU General Public License (GPL)
Changes:
This release provides codec preprocessing options for noise reduction, voice activity detection, and automatic gain control for all audio codecs. Tel-URIs are now supported as a destination address for a call or instant message. For authentication, AKAv1-MD5 is now supported in addition to plain MD5.
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