Hi all: I am confused what function will signal rtpproxy the port mapping while the nat traversal is activated? Does "force_rtp_proxy" achieve that function ? In the doc http://www.iptel.org/ser/doc/modules/txt/nathelper.txt Maxim says that "force_rtp_proxy" will "Rewrites SDP body to ensure that media is passed through an RTP proxy." Does it means the function "force_rtp_proxy" will change the port in SDP, and also signal rtpproxy the port mapping that he should transport ? Thanks in advance Brian