The Cisco Catalyst 6500 Series Ethernet and Fast Ethernet switching modules offer unparalleled physical interface flexibility, and support wire-speed, switched connectivity for unshielded twisted-pair (UTP), shielded twisted-pair (STP), and fiber-optic cable. Up to 12 48-port 10/100 modules can be added to a Cisco Catalyst 6500 Series platform representing industry-leading performance and scalability for the customers.