Cisco ISR4331-V/K9

Overview

The Cisco ISR4331-V/K9 is a voice-ready branch router designed to deliver reliable connectivity and security within a single chassis. It supports both data and voice traffic, making it suitable for offices or call centers that require integrated communication without the need for separate devices. With a system throughput ranging from 100 to 300 Mbps, this router ensures smooth performance even during peak usage.

Equipped with three Gigabit Ethernet ports and two SFP fiber slots, it offers flexible options for wired and fiber connections. The multi-core CPU architecture supports concurrent processing of voice and data, maintaining responsiveness for critical applications and calls.

Key features

• Three Gigabit Ethernet ports that provide versatile connectivity for WAN or LAN devices
• Two SFP fiber ports allowing for flexible uplink options where copper connections are impractical
• Multi-core CPU architecture that handles voice and data traffic simultaneously without performance degradation
• One service module slot enabling future expansion for additional voice interfaces or specialized network services
• Integrated security features including IOS XE Security to protect network traffic at the hardware level
• Wide Area Application Services (WAAS) and Intelligent WAN (IWAN) to optimize cloud access and application performance
• Application Visibility and Control (AVC) and OnePK for deep insight into bandwidth usage and network management
• 4 GB of Flash storage and 4 GB of DRAM providing sufficient capacity for IOS XE images, call processing, and logging

Key specs

• System throughput: 100 to 300 Mbps
• Ethernet ports: 3 x Gigabit Ethernet
• Fiber ports: 2 x SFP slots
• Processor: Multi-core CPU
• Flash storage: 4 GB
• DRAM: 4 GB
• Service module slots: 1

Connectivity and compatibility

This router supports a variety of connection types to fit different network environments. The three Gigabit Ethernet ports can be used for wired devices or upstream links, while the two SFP slots accommodate fiber connections, which are ideal for longer distances or environments where copper wiring is not feasible. This flexibility makes it a strong choice for small to midsize enterprises, remote sites, or customer service departments that require dependable voice and data routing.

Performance and reliability

The multi-core CPU and architecture designed for sustained throughput ensure that voice and data traffic remain responsive even during busy periods. Integrated security and performance services at the hardware level protect your network while optimizing application delivery. This combination supports a stable and secure environment for business-critical communications and data transfer.

Ideal uses and environments

The Cisco ISR4331-V/K9 fits well in environments that demand integrated voice and data capabilities without additional hardware complexity. It is well suited to branch offices, call centers, and remote locations where reliable voice communication is essential alongside data routing. Its expansion slot allows the router to adapt as network needs evolve, making it a practical investment for growing businesses.

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