Power over Ethernet (POE), Power over Ethernet plus (POE+) allows users to transmit electrical power along with data on standard Ethernet cables. Advantage of POE is one cable is used to run power and data, it saves on labor and materials costs by not having to use 2 separate cables. Cables used are Cat 5 and Cat 6 plus many more. Ethernet PHY and Magnetic circuits with combined Resistor/Capacitor networks, this does the filtering function to remove noise and distortion so that only clear signals go along the transceiver lines between the equipment and the PHY Chip. PHY is picked relative to application speed range and the amount of filtering required.