Hello. OpenSIPs 2.2.2
Continue http://www.opensips.org/pipermail/users/2009-September/008294.html
"failure_route[1] {
        if (t_check_status("500")) {
                if (  $(<reply>hdr(Disconnected)) != NULL )  {
                        t_reply("480", "Temporarily Unavailable");
                        break;
                }
        }
}" - does not work. Because "$(<reply>hdr(Disconnected))" equal NULL.