Hi all, First of all, good day :) Wondering if any of you guy experience in RTPProxy, previously all voice stream I'll simply forward to Asterisk. Straight to the point, now I've a working SIP server with combination of OpenSER and Asterisk, (location A) but I'll need to setup another OpenSER w/ RTPProxy server on different location, (location B) the point of this setup is to make when UA connected to location B, all the signaling are forward/relay to location A, but RTP stream will be handled by RTPProxy @ location B, which RTP stream should contain IP address of location B instead of A. I've tried numerous setup but couldn't get it work. _Setup #1_ openser.cfg # after sanity check rewritehost("location A IP"); sl_send_reply("300", "redirect"); This works but somehow I need to append IP/hostname to the destination number (eg., 001 became 001(a)sip.myhost.com), and ethereal trace on UA still showing the IP in RTP stream is location A not B. _Setup #2_ openser.cfg if (!is_method("INVITE")) { rewritehost("location A IP"); t_relay(); } else { # INVITE force_rtp_proxy; } but this setup doesn't work :( Do I need to configure the rtp proxy? I couldn't find any configurable file (.conf) for RTPProxy, according to the manual it shall extract the destination IP/hostname and automatically relay the RTP stream, but .. I'm still no luck with it. Can't really recalled others config, but does anyone come across this similar setup? mind to share your experience with me? And, it that really possible to put location B's IP into RTP stream, but actually the main back end was on location A (asterisk) ? Thanks in advance. Regards, David Loh