ISR4331/K9 CISCO ISR 4000 Series Router Module

The Cisco ISR4331/K9 is an Integrated Services Router from Cisco’s ISR 4000 series, designed to deliver WAN connectivity, security, and application services for enterprise branch offices. This mid-range router features three onboard Gigabit Ethernet ports and supports modular network interface cards for flexible WAN and LAN connectivity options.

The ISR 4331 is positioned for medium-sized branch deployments requiring a balance of performance and services integration. It supports Cisco IOS XE software and can run containerised applications, unified communications, and advanced security services concurrently through its multi-core architecture.

As part of Cisco’s current enterprise routing portfolio, the ISR4331/K9 remains widely deployed in branch office environments where organisations require a consolidated platform for routing, voice, and security functions without the footprint of multiple appliances.

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