The KSZ9031 is a completely integrated triple-speed (10Base-T/100Base-TX/1000Base-T) Ethernet physical-layer transceiver for transmission and reception of data on standard CAT-5 unshielded twisted pair (UTP) cable.The KSZ9031MNX offers the industry-standard GMII/MII (Gigabit Media Independent Interface/Media Independent Interface) for connection to GMII/MII MACs?in Gigabit Ethernet processors and switches for data transfer at 1000Mbps or 10/100Mbps.?The KSZ9031RNX provides the reduced gigabit media independ