ISR4431-X/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

Experience enterprise‑grade performance and uncompromising security with the Cisco ISR4431‑X/K9, a compact 1U rack‑mountable router engineered for modern VoIP and data environments. Built on the resilient Cisco 4000 Series platform, it delivers seamless integration of voice, video, and data traffic while providing advanced threat protection, secure VPN capabilities, and flexible routing options. Its modular design supports high‑bandwidth connectivity, enabling rapid deployment and easy expansion to meet growing network demands. Ideal for small to mid‑size businesses, this router combines robust reliability, intuitive management, and comprehensive compliance features to keep your communications fast, clear, and protected.