Cisco Catalyst 4900M 20-port 10/100/1000 RJ-45 half card Half-Card Module Specifications Specification Description Module type 10/100/1000BASE-T half-card Ethernet module Port duplex mode: Half- or full-duplex mode Port speed: 10, 100, or 1000 Mbps Number of ports: 20 Connector type: RJ-45 Cable type: Category 5 and Category 6 Cabling distance: 328 ft (100 m) Pluggable transceivers support : Not supported Module upgrades available: None Power over Ethernet :Not supported