route[WITHINDLG] {
        if (has_totag()) {
                if (loose_route()) {
                        record_route();
                        if (is_present_hf("Contact")) {
                                fix_nated_contact();
                        }
                        t_on_reply("REPLY_INDIALOG");
                        append_hf("X-Server: SERVERNAME\r\n");
                        if (!t_relay()) {
                                sl_reply_error();
                        }
                } else {
                        if ( is_method("ACK") ) {
                                if ( t_check_trans() ) {
                                        t_relay();
                                        exit;
                                } else {
                                        exit;
                                }
                        }
                        if ( is_method("NOTIFY") ) {
                                record_route();
... doing some DB stuff here
                                add_rr_param(";dfpx=$avp(defaultpbx);kd=$avp(kundenid)");
                                append_hf("X-Server: SERVERNAME\r\n");
                                t_relay();
                                exit;
                        }
                        sl_send_reply("404","Not here");
                }
                exit;
        }
}