Hello all, I plan to use SER with MediaProxy as a far-end NAT traversal solution. As much as I understand, SER Proxy server does the actual RTP traffic forwarding between the parties. Using SER with MediaProxy only as a far-end NAT traversal solution (or using RTProxy) can I forward register to a 3rd party Proxy /registrar or the nated parties have to register with SER ? Thanks for any help, GTel