... RJ-45 WS-X6148-RJ-45Catalyst 6500 48-Port 10/100, Upgradable to Voice, RJ-45 WS-X6148-RJ21V^Catalyst650048-port10/100InlinePowerModule,RJ-21 WS-X6148-RJ ... TDR, Upgradable - PoE 802.3af WS-X6148A-RJ-45=Catalyst 6500 48-Port 10/100 w/TDR, ... port 10/100/1000 w/Jumbo Frame, RJ-45 WS-X6148A-GE-45AFCat6500 48-Port PoE 802 ... 10/100/1000 GE Mod: fabric enabled, RJ-45 WS-X6704-10GECat6500 4-port 10 Gigabit Ethernet ...