The Cisco Catalyst 4500E Series 48-port Gigabit Ethernet line cards provide high-performance 10/100/1000 switching. They are designed for LAN access applications where desktop users require Gigabit connection speeds. This line cards also support standard IEEE 802.1AE encryption & Cisco Trust Sec in hardware. Features &9679; 48 ports nonblocking &9679; 10/100/1000 module (RJ-45) &9679; Cisco IOS XE Release 3.1.0SG or later &9679; IEEE 802.3af/at & Cisco prestandard Po E, IEEE 802.3x flow control &9679; IEEE 802.1AE & Cisco Trust Sec capability in hardware &9679; L2-4 Jumbo Frame support (up to 9216 bytes) &9679; Capable of up to 30 W of inline power per port on all ports simultaneously &9679; Enterprise & commercial: designed to power next-generation IP phones, wireless base stations, video cameras, & other Po E devices &9679; Campus & branch applications requiring enhanced performance for large file transfers & network backups