This is easily most complicated things I’ve ever written since college. Core audio on ios kicked my butt and took me days to figure it out and a networking error with RTP drove me nuts for a few more days. I’ve never worked with RTP or audio before, so the whole exercise was highly educational.
Monal 2.07 will support XMPP jingle VOIP using XMPP jingle. It will remain open in the background and will not close after 10 min and you can also make calls to people on google talk!