The Cisco Catalyst Supervisor Engine III delivers next-generation switching technology with proven Cisco IOS Software to power scalable, intelligent multi-layer switching solutions for converged voice, video, and data networks. Optimized for the enterprise wiring closet, branch-office backbones, or Layer 3 distribution points, the Cisco Catalyst Supervisor Engine III provides the performance and scalability to handle today's and tomorrow's network applications. Compatible with the widely deployed Cisco Catalyst 4006 chassis and existing Cisco Catalyst 4000 family line cards, Supervisor Engine III ensures investment protection to further strengthen the scalability of the modular Cisco Catalyst 4000 series.