ISR4331-B/K9 Cisco 4000 Series 4331 3 x onboard WAN or LAN Ports 1000Base-T + 2 x RJ-45 Ports + 2 x SFP Ports Gigabit Ethernet 1U Rack-mountable VoIP Gateways Router

The Cisco 4331 router from the 4000 Series delivers enterprise‑grade reliability and performance for growing networks. Designed for rack‑mount deployment, it provides versatile connectivity with a blend of high‑speed Ethernet and fiber interfaces, supporting seamless integration of VoIP gateways and secure routing functions. Its modular architecture enables easy expansion, while built‑in security features protect data and voice traffic. Managed through an intuitive interface, the device simplifies configuration and monitoring, helping IT teams maintain optimal uptime. Ideal for midsize businesses and branch offices, this solution combines flexibility, robustness, and Cisco’s trusted support in a compact rack‑mount size.