... PoE 802.3af 10/100 - RJ-21 WS-X6148-RJ45V^Catalyst650048-port10/100InlinePower,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-21Catalyst 6500 48-Port 10/ ... 100 Upgradable to Voice, RJ-21 WS-X6148-RJ-21=Catalyst ...