________________
modparam ("nathelper",rtpproxy_sock","udp: 192.168.2.75:12222"

if(nat_uac_test("19"))
{
            if(method=="REGISTER")
           {          
                     fix_nated_register();
                     force_rport();
                      setflag(6);
          } else
           {
                    
                       if(method=="INVITE")
                       {
                         fix_nated_sdp("3")
                      };
                     fix_nated_contact();
          };
  };