LynxPhone is an easy-to-use, simple and highly customizable VoIP softphone based on open standards. Fully open, you can use the phone on any network. It has none of the complications of other open softphones and is easy to use.Features: • SIP signalling • TLS, S/MIME & SRTP call encryption • G.711, GSM, Speex, Speex Wideband & G.726-32 Codecs • NAT detection • Message-waiting indicator • Distinctive ringtones • Customizable skins • English, German, Spanish, French, Italian, Dutch & Portuguese language support • Echo cancellation, automatic gain control & voice activity detection • QOS support (intserve, diffserve, 802.1p) • Adaptive jitter buffer & packet-loss concealment • Integrated with Windows Address Book (WAB) • CallTo & SIP URL support • Remote-control feature Download for Unix and MacOS are available at the developerТ‘s website.