This module supports 48 fabric-enabled 10/100 Fast Ethernet Modules RJ45 and is for use with Cisco Catalyst 6500 Series Switches. These high performance multilayer switches are optimized for the most demanding Enterprise and Service Provider applications. The Catalyst 6500 series is the foundation for secure converged network services providing data and voice integration, LAN/WAN/Metro consolidation, and intelligent multilayer switching in core, distribution, data center, and wiring closets.