The Cisco ISR4331-V/K9 is a versatile and high-performance voice and data router designed for modern enterprise branch networks. It combines advanced routing, security, and unified communications into a single compact platform, making it ideal for organizations that require reliable connectivity and seamless voice integration.

This router features three Gigabit Ethernet ports—two RJ-45 and two SFP combo interfaces—offering flexible WAN and LAN configurations. It also includes two NIM slots and one SM-X slot for additional modules such as voice interface cards or network expansion options. With throughput that scales up to 300 Mbps, the ISR4331-V/K9 ensures fast and secure data transfer for multiple branch applications, including VoIP, VPN, and cloud connectivity.

Powered by Cisco’s IOS XE software, it supports advanced SD-WAN functionality, security policies, and centralized management, giving IT teams full control over branch operations. Its integrated voice capabilities make it ideal for businesses that need unified communication solutions, combining call control, conferencing, and messaging in one device.

The compact 1RU design fits easily into network racks, while its energy-efficient architecture ensures reduced operational costs. The Cisco ISR4331-V/K9 provides a reliable foundation for secure, high-quality voice and data services—perfect for enterprises looking to unify communications and strengthen branch performance.