The Cisco Catalyst 4006 Supervisor Engine III integrates nonblocking Layer 2/3/4 switching with enhanced control, enabling business agility for enterprise and metropolitan Ethernet customers deploying Internet-based applications. As a key component of Cisco AVVID (Architecture for Voice, Video and Integrated Data), the Cisco Catalyst 4000 extends control from the backbone to the network edge with intelligent network services, including advanced quality of service (QoS), scalable performance, comprehensive security, and simple manageability. The modular architecture, media flexibility, and expandability of the Cisco Catalyst 4000 enable a longer deployment life in converged networks. This reduces the cost of ownership by minimizing recurring operational expenses, thus improving return on investment (ROI).The Cisco Catalyst Supervisor Engine III delivers next-generation switching technology with proven Cisco IOS Software to power scalable, intelligent multilayer 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.