The 4-Port Gigabit Ethernet 8-Port 10/100BASE-TX access card provides both Gigabit Ethernet and Fast Ethernet connectivity. The access card is located in the lower card slot of the Cisco 10720 Internet Router.PRODUCT FEATURES:Small Form-Factor Pluggable (SFP) technology with power monitoring;Gigabit Ethernet flow control auto negotiation;802.3x flow control;Priority mapping for 802.1p tagged packets;High-priority protocol classification.