[Freeswitch-users] freeswitch originate command with customized SBC/proxy ip

Hi, I want to know if freeswitch originate command can bring customized ip address for SDP other than ip of freeswitch itself. Since I want to build a system as: client - SBC/proxy - freeswitch -SBC/proxy - client, and I want to let RTP established on SBC/proxy - SBC/proxy. In other words, I don't want to let RDP pass through freeswitch, so I need to bring SBC/proxy ip address in originate command for SDP. Is there any way to achieve it? Many thanks, Leo