WS-XG-2T 16 Port 10G with DFC4 WS-XG-2T= 16 Port 10G with DFC4 WS-XT-2TXL= Catalyst 6500 16-port 10GbE 10GBASE-T module w/DFC4XL S WS-XT-2T= Catalyst 6500 16-port 10GbE 10GBASE-T module w/DFC4 S WS-XT-2TXL 16 Port 10G Ethernet Copper Module with DFC4XL WS-XG-2TXL 16 Port 10G with DFC4XL WS-XG-2TXL= Catalyst 6500 16 port 10 Gigabit Ethernet w/ DFC4XL S WS-XT-2T Catalyst 6500 16-port 10GbE 10GBASE-T module w/DFC4 WS-XG-2T-RF C6K 8 port 10 GE module with DFC4(Trustsec) S REMANUFACTURED WSXG2TXL-RF C6K 8 port 10 GE module with DFC4XL(Trustsec) REMANUFACTURED WS-XG-2T-RF 16 Port 10G with DFC4 REMANUFACTURED WS-XG-2T-RF Cat 6900 4-port 40G/16-port 10G FiberMod DFC4 REMANUFACTURED WS-XG-XL++= C6K 8 port 10 Gigabit Ethernet module with DFC4XL (Trustsec) WS-XG-2T++= C6K 8 port 10 Gigabit Ethernet module with DFC4 (Trustsec) S 2D-XT-2T= Cat 6500 16P 10GbE 10GBASE-T module w/DFC4 S w/2D barcode 2D-XT-2TXL= Cat 6500 16P 10GbE 10GBASE-T module w/DFC4XL S w/2D barcode 2D-XG-2T= 16 Port 10G with DFC4 with 2D barcode