Does anyone know of a good SIP softphone with G.729 codec support?
I understand that this codec is patented, which is why ekiga and twinkle do not include it. With Windows and Mac, a few vendors sell softphone with G.729 support, but I've not found any that offer this for Linux.
I'am using resiprocate stack on the server, it's working fine for softphone-softphone, browser-browser and softphone-browser calls, but when I'm trying to call from browser to softphone it failes with recv=SIP/2.0 488 Not Acceptable Here.
As webrtc implementation I tried sipml5 and jssip with the same results. As softphone I use csipsimple, but I also tried few others.