The Fast Ethernet access card provides network access using Fast Ethernet connectivity on a 10/100BASE-TX or 100BASE-FX. The access card is located in the lower card slot of the Cisco 10720 Internet Router.PRODUCT FEATURES:Ethernet ARPA MAC encapsulation;48000 ARP entries (MAC addresses);Cisco IOS Ethernet features and CLI;Operating Wavelength of 1310 nm;Transfer Distance of 15 km.