Hello!

Please check www.flashphoner.com
This is RTMP-SIP server for making web calls from the browser to phones
It have built-in FlashPhone and JavaScript Phone

Functions:
- Audio - Speex, g.711, g.729
- Video - h.263, h.264
- SIP - calls, transfer, hold, DTMF, IM chat
- API - ActionScript, JavaScript
- Open source client
- Open source server java app

Thanks,
Pavel