Cisco continues to develop and evolve the award-winning Catalyst 5500 Series with the introduction of a new chassis: the Catalyst 5509. The new Catalyst 5509 protects customers' Catalyst 5000 Family investments by seamlessly integrating all existing Catalyst 5000 Series interface modules and features into a new, high-performance chassis. The Catalyst 5509 provides dedicated switching for up to 384 users, making this chassis an ideal platform for wiring closet solutions. The Catalyst 5509 also supports high-density Gigabit Ethernet for switched intranet backbones and data centers that require multimillion-pps forwarding rates.As a low-cost wiring closet solution, the Catalyst 5509 supports high-density, dedicated Token Ring or 10/100/1000 Ethernet switching. The Catalyst 5509 can support up to 384 dedicated switch ports with only a 15A circuit requirement, allowing for easy installation in most wiring closet environments. The Catalyst 5509 also supports all advanced Cisco features for the wiring closet, such as automatic protocol broadcast filtering to conserve valuable bandwidth, intelligent multicast forwarding to handle multimedia traffic, and load balancing over redundant links. With its support for hot-swappable modules, power supplies, and fans, the Catalyst 5509 chassis delivers high availability for production networks. Dual-redundant switching engines, power supplies, and a passive backplane design ensure full system redundancy for mission-critical environments. Supervisor Engine II or higher can be used in a Catalyst 5509. The Catalyst 5509 chassis fits into a standard 19-inch rack, and all system components are accessible from the same side of the chassis. Only one power supply is required to run a fully configured system.In order to meet the evolving needs of today's networks the Catalyst 5000 Family offers five supervisor engines that can be deployed in any Catalyst 5000 chassis. This broad range of supervisor offerings allows the Catalyst 5000 Family to deliver products that are optimized for the wiring closet or small- to medium-sized campus backbones.