Re: [SR-Users] Web softphone using websockets against Kamailio

** Hello, This topic has been covered many times on the Kamailio/SIP Router lists and the answers you require can be found by searching the lists. I will briefly recap: - SIP signalling and media are totally separate things - SIP over WebSockets will allow an HTML5 based client to exchange signalling information with standard soft-phones and hard-phones. However, this does not mean that the media will interwork - HTML5 media streaming uses WebRTC. WebRTC mandates the use of the RTP/SAVPF media profile which is not yet supported by many soft-phones, hard-phones, or media servers This means that, provided you have configured Kamailio and sipml5 correctly, you can get the signalling part of a call working but you will almost certainly have media issues. Kamailio is a SIP signalling device, not a media device, so fixing these media issues is outside of the scope of Kamailio. You do have a few of options with regards to the media but they are limited at the moment. - You can try and find a phone/client that supports RTP/SAVPF (the only ones I know of are the Doubango clients and they sometimes have other issues). - You can use a media server to convert from RTP/SAVPF (Asterisk supports this in theory, but does have issues - I believe there are fixes in the latest Asterisk trunk if you want to compile it yourself - and there may be some non-open-source media servers available). - You can use an RTP Proxy to convert from RTP/SAVPF (erlrtpproxy has this feature on the roadmap, but I don't know whether it is available yet). As for IE support, your guess is as good as mine. Microsoft has its own agenda and has recently been pushing the competing CU-Web-RTC specification. I have a personal opinion about how things will eventually evolve but no facts to share here - I don't believe anyone outside of Microsoft could tell you what will actually happen with IE. Regards, Peter On Mon, 2013-01-28 at 20:45 +0200, Pirjo Ahvenainen wrote: Greetings gurus! I'm playing with an idea to create a web based softphone (html5 + no installations for the end user) and use Kamailio's websocket module for backend. I'd love to hear about your comments, challenges and successes using such configuration. Is it a feasible way to construct a softphone even today when even IE9 does not support websockets, as such? I'm sure IE9 will end up in specs as a must-support platform. A collegue tried using sipml5 with webrtc against a SnomONE pbx (I know... ;)), and said there's no way it can work, but I'm not convinced the idea itself wouldn't work. It would help me lots if I could make a simple example using Kamailio with SIP over websockets, can you comment on how much effort do I need on Kamailio side to make this work? Do I need off-default config scripting, or is it enough to just set up the module and set the parameters? And even with the risk of stepping a little off topic, if anyone has worked on web based softphones, I'd love to hear if you can recommend on how to approach this. Cheers, Pirjo _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing listsr-users@lists.sip-router.orghttp://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users -- Peter Dunkley Technical Director Crocodile RCS Ltd _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users(a)lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users