route{
	setflag(LOG_FLAG);
	sip_trace();

	if (!mf_process_maxfwd_header("10")) {
		send_reply("483","Too Many Hops");
		exit;
	}

	# requests for my domain

	if (is_method("REGISTER")) {
		# authenticate the REGISTER requests
		if (!www_authorize("", "subscriber")) {
			www_challenge("", "0");
			exit;
		}
		if (!db_check_to()) {
			send_reply("403","Forbidden auth ID");
			exit;
		}

		if (!save("location"))
			sl_reply_error();

		exit;
	}

	if ($rU==NULL) {
		# request with no Username in RURI
		send_reply("484","Address Incomplete");
		exit;
	}

	if (lb_is_destination("$si","$sp") ) {
		# request from a LB destination
		# we should look to see where this call should be sent
		lookup("location");
		route(1);
	}

	if (is_method("INVITE")) {
		setflag(CDR_FLAG);

	}

	# detect resources and do balancing
	# PSTN call, but the GWs supports only G711
	# for calls without G711, transcoding will be used on the GW
	if ( !search_body("G711") ) {
		   load_balance("1","transc;pstn");
	} else {
		   load_balance("1","pstn");
	}


	# LB function returns negative if no suitable destination (for requested resources) is found,
	# or if all destinations are full
	if ($retcode<0) {
		 sl_send_reply("500","Service full");
		 exit;
	}

	# send it out
	if (!t_relay()) {
		sl_reply_error();
	}
}

route[1] {
	if (!t_relay()) {
		sl_reply_error();
	};
	exit;
}