Cisco ISR 4331 3GE 2NIM 1SM 4G Flash 4G DRAM | Router, Enterprise — SP-AR3-N9348FXB

Keep critical branch services online with a router designed for secure, modular WAN edge deployments. The Cisco ISR 4331 combines 3 Gigabit Ethernet ports with 2 Network Interface Module slots and 1 Service Module slot, giving infrastructure teams the flexibility to match connectivity and service requirements without replacing the platform. With 4 GB flash and 4 GB DRAM, this model is sized for branch routing, policy enforcement, and edge services that need consistent local processing. It is a practical fit for organizations standardizing on Cisco ISR architecture and looking for a platform that can support growth through modular add-ons rather than forklift upgrades. For teams comparing entry branch routers to higher-capacity edge platforms, the ISR 4331 stands out when uptime, serviceability, and expansion matter more than lowest initial cost. It is built for environments where the router is not just a pass-through device, but a control point for connectivity, segmentation, and service delivery. Ideal For Branch office WAN edge routing Distributed site connectivity standardization Modular expansion for edge services Secure branch network aggregation Why This Product 1 More modular than fixed-port branch routers 2 Better suited for edge services than basic access routers 3 Designed for Cisco ISR standardization across branches 4 Balances expansion options with compact branch deployment