firewall {
    family inet {
        filter v4-inbound {
            term accept-voip {
                from {
                    protocol udp;
                    destination-port 5061;
                }
                then {
                    count accept-voip;
                    accept;
                }
            }
            term police-all {
                then {
                    policer police-500kbps;
                    count police-all;
                    accept;
                }
            }
        }
    }
    policer police-500kbps {
        if-exceeding {
            bandwidth-limit 500k;
            burst-size-limit 50k;
        }
        then discard;
    }
}