Cisco WS-X6548-GE-TX Internal 1Gbit/s network switch component

Module 48p 10100/1000 ENet for Cat 6500 Forwarding 256 Designed for premier wiring closets, small campus backbone, and server farm applications, Cisco Express Forwarding 256 10/100 and 10/100/1000 Ethernet-over-copper interface modules provide line-rate 10/100 Ethernet forwarding and gigabit bandwidth options.
This is Catalyst 6500 Series 48-Port 10/100/1000 RJ-45 Cisco Express Forwarding 256 Interface Module; field-upgradable to support Cisco Prestandard PoE daughter card or 802.3af PoE daughter card.