The Cisco Catalyst 4500 Series offers a variety of GBIC- or SFP-enabled gigabit solutions for high-performance Gigabit Ethernet uplinks and server farm connectivity. The five GBIC- or SFP-enabled gigabit line card options for the Cisco Catalyst 4500 Series include 2-, 6-, 18-, and 48-port versions. GBIC or SFP technology allows customers to intermix intra-building MMF connections and long-distance single-mode connections simply by changing the GBIC or SFP type. Features: • PoE IEEE 802.3af and Cisco prestandard (RJ-45 only) • Provides full line-rate Gigabit switching on all ports • L2-4 Jumbo Frame Support (up to 9216 bytes) • Designed to give customers the choice of RJ-45 with or without PoE and SFP without incurring extra costs • Enterprise and commercial: High performance desktop connectivity and server farms. Designed to power IP phones, wireless base stations, video cameras, and other IEEE-compliant appliances • Metro Ethernet: Designed for service providers to run point-to-point Gigabit Ethernet over single-mode fiber