route[CR] {


        if(!cr_route("default", "default", "$rU", "$rU", "call_id")){
                sl_send_reply("403", "Not allowed");
        } else {
                # In case of failure, re-route the request
                t_on_failure("1");
                # Relay the request to the gateway
        }

			#set CallerID suitables for PSTN instead of 3-digit internal number
           if($rd=="1.2.182.78" || $rd=="sbc.myself.com" || $rd=="1.2.176.246" || $rd=="mediant.myself.com")
                uac_replace_from("sip:[email protected]");

                t_relay();
        exit;
}

failure_route[1] {
        revert_uri();
        # In case of failure, send it to an alternative route:
        if (t_check_status("40[18]|5[0-9][0-9]")) {
        #choose route domain 1 of the default carrier
        if(!cr_route("m200", "fallback", "$rU", "$rU", "call_id")){
                        t_reply("403", "Not allowed");
                } else {
                        t_on_failure("2");

                        t_relay();
                        exit;
                }
        }
exit;
}