... resiliency, virtualization, and automation. Cisco Catalyst 4500 Series Switches provide borderless performance, scalability, and services ... generations, the new Cisco Catalyst 4500E Series provides exceptional investment protection and deployment flexibility ... future proof their network.WS-C4503-ECisco Catalyst E-Series 4503 switch (3-slot chassis), fan, ... original WS-C-4503-E E-Series 4503 switch