The Cisco Catalyst 4500 series 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. Features 12 port line-rate SFP line card providing 24 gigabits per-slot capacity Inherits E series Supervisor Engine Qo S capability Enterprise, mid-market, and commercial core & distribution deployments requiring line-rate capability Service provider:GE aggregation for DSLAM/PON/mobile data backhaul