I install rtpproxy and config as follow, but it didn't work, is my config OK ? My config: PUB_IP: public ip of kamailio PVT_IP: private ip of kamailio 1. start rtpproxy rtpproxy -l PUB -s udp:localhost:7722 -F 2. kamailio.cfg #!define WITH_MYSQL #!define WITH_AUTH #!define WITH_ALIASDB #!define WITH_USRLOCDB #!define WITH_NAT listen=PVT_IP modparam("rtpproxy", "rtpproxy_sock", "udp:localhost:7722") -- Best Regards, Shengy