[SR-Users] WebRTC + Kamailio as SIP-proxy + rtpproxy(?) as media-proxy

Hello, I'm new to WebRTC although I've been using kamailio as sip proxy server for few months now. What I really do not know and trying to understand is - a) Can kamailio be used as sip-proxy while using WebRTC based UA calling to plain UAC/WebRTC based UAC ? b) What to use for media proxying (this really baffles me..) rtpproxy or rtpengine (?) or mediaproxy or rtpproxy-ng ? Is there any relation between them anywhere? c) I am not behind NAT and do not want secure web-sockets, so any sample config I can refer to ? d) Most likely, I'd be dealing with WebRTC <----->kamailio <-------> Freeswitch, but any pointers for WebRTC UAC to WebRTC based UAC or normal UAC would really be helpful. Kindly accept my thanks in advance for this !! -- Warm Regds. MathuRahul