The last line card is theWS-X6148A-GE-45AF which is a 48-port RJ45 1Gbit PoE line card. The first line card installed into this Cisco WS-C6504-E Chassis is the WS-X6716-10G-3C which provides 16x X2 Fibre Optical ports for 10Gbit Fibre Optical connectivity, either using SR (Short Range Multi-Mode) or LR (Long Range Single Mode) X2 GBIC modules.
eBay