[Users] rtpproxy redundancy

For various reasons we've elected to go with Porta/Maxim Sobalov's rtpproxy as opposed to the MediaProxy code; however, we would like to know if its possible to do any of the following with rtpproxy or if we should consider going to MediaProxy instead 1) Multiple Load Balanced rtpproxy servers 2) Voice path fail over, so that if we lose 1 RTP proxy the call continues on another. I was thinking 2 could be implemented using an OpenBSD/CARP FreeBSD/CARP type of scenario, where 2 rtpproxy servers share 1 IP address; however, OpenSER would need to set up an rtpproxy session on BOTH servers to accomplish this and the OS can do the rest. Any opinions or comments are welcome.