Description
Cisco ISR4331/K9 Router delivers secure, high-performance WAN services with modular scalability, advanced VPN, firewall, and QoS for enterprise networking.
Product Features
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Cisco ISR4331/K9 Integrated Services Router
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Designed for secure, scalable enterprise WAN connectivity
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Modular architecture supporting voice, data, and security services
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Runs on Cisco IOS XE software for advanced features and updates
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3 network interface slots for flexibility and future expansion
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Integrated VPN, firewall, and QoS features
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Compact 1RU rackmount form factor
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High availability and redundancy support for mission-critical networks
General Product Information
The Cisco ISR4331/K9 Integrated Services Router is part of the Cisco ISR 4000 Series, purpose-built to deliver secure, high-performance networking for branch and enterprise environments. Offering a balance of scalability, flexibility, and reliability, the ISR4331/K9 is engineered to meet the evolving needs of modern IT infrastructures.
Equipped with a modular architecture, this router supports a wide range of integrated services, including voice, data, security, and application optimization, all in a compact 1RU form factor. With Cisco IOS XE software, enterprises benefit from advanced features like VPN, firewall, QoS, and application visibility, ensuring efficient and secure WAN deployments.
The ISR4331/K9 supports 3 network interface slots, enabling flexibility for WAN, LAN, and service module expansions, making it an excellent long-term investment for organizations that need scalable branch connectivity. Built with Cisco’s renowned reliability, it ensures uninterrupted service with options for redundancy and high availability.
Ideal for businesses seeking a future-proof enterprise router, the Cisco ISR4331/K9 delivers the performance, flexibility, and security needed for digital transformation.
Technical Specifications Table
| Specification | Details |
|---|---|
| Brand | Cisco |
| Model | ISR4331/K9 |
| Series | Cisco ISR 4000 Series |
| Form Factor | 1RU Rackmount |
| Network Interface Slots | 3 (2 NIM, 1 SM) |
| LAN/WAN Ports | Modular (Gigabit Ethernet options) |
| Operating System | Cisco IOS XE |
| Security Features | VPN, firewall, intrusion prevention, QoS |
| Performance | Optimized for branch WAN services |
| Expansion Options | Network Interface Modules (NIMs), Service Modules (SMs) |
| Power Supply | Internal AC, optional redundancy |
| Warranty | Sold as-is (refer to store policy) |
Compatible Products
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Cisco Catalyst Switches (2960, 3650, 9300 Series)
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Cisco ASA / Firepower Firewalls for layered security
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Cisco UCS servers for enterprise applications
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Compatible with 19-inch racks and accessories
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Cisco IP phones & Unified Communications solutions
Ideal Use Cases
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Enterprise WAN edge connectivity
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Branch office networking with integrated services
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Secure VPN and firewall deployments
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Unified communications and VoIP networks
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Cloud and hybrid IT environments
Comparison Angle
Compared to previous ISR 3900 Series models, the ISR4331/K9 offers:
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Higher throughput and modular scalability
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Support for advanced security features on Cisco IOS XE
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Improved energy efficiency and compact 1RU form factor
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Enhanced application visibility and performance optimization
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More flexible expansion with NIM and SM slots
Cross-Sell / Upsell Suggestions
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Cisco Catalyst 9300 switches for LAN expansion
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Cisco Firepower Next-Gen Firewalls for enhanced security
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Cisco UCS servers for virtualization & enterprise workloads
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Rackmount kits, rails, and power accessories
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Cisco VoIP phones and unified communications bundles