Flashphoner WebCallServer supports not just Flash calls, but also WebRTC stack making possible high-quality calls in Chrome and Firefox without using Flash. Our solution was tested with major IP-PBX (Asterisk, FreePBX) and SIP-Proxy. All functionality for the call button (Click2Call) is already implemented, both the server and the cliebt parts. This turnkey solution is easy to embed to your website. The client code is opensource. And of course, our friendly technical support is ready to help you install the demo and resolve any questions you may have while deploying the service.