The Catalyst 4500 E-Series "Premium" PoE line card (WS-X4648-RJ45V+E) has all of the PoE features of the "Classic" and E-Series PoE card with the addition of future software upgradeability to support up to 30 Watts per port. The Cisco Catalyst 4500 48-port 10/100/1000 E-Series line card is designed for LAN access applications where desktop users require gigabit connection speeds.