Cisco Systems Cisco ISR4331/K9 Integrated Services Router (ISR 4331)

The Cisco ISR4331/K9 Integrated Services Router is a high‑performance, modular enterprise‑class router engineered for secure, scalable, and reliable network edge connectivity in business environments in Kenya. Designed for small to medium enterprises, branch offices, and distributed networks, the ISR 4331 delivers advanced routing, integrated security, unified communications support, and application optimization. With dual onboard WAN interfaces, flexible modular expansion, and robust performance, this router supports mission‑critical services such as secure VPN, MPLS, voice, video, and cloud connectivity for modern business networks.

Product Features

High‑Performance Routing Engine

Powered by Cisco’s advanced multicore architecture, the ISR4331/K9 delivers scalable performance for high‑throughput WAN connectivity, dynamic routing protocols, and concurrent services without compromising throughput or responsiveness.

Integrated Security Services

Includes built‑in firewall, secure VPN (IPsec), intrusion prevention, and advanced threat defense capabilities, ensuring secure access to corporate resources and encrypted communications across branch and remote site networks.

Unified Communications and Voice Support

Supports Cisco Unified Communications features, including integrated VoIP, SIP trunking, and voice quality optimization, enabling reliable IP telephony and collaboration services from the network edge.

Dual WAN Interfaces and Flexible Connectivity

Equipped with multiple onboard Gigabit Ethernet WAN interfaces and modular network interface card slots, enabling flexible WAN deployment options including broadband, fiber, and leased line connectivity.

Modular Expansion and Scalability

Supports modular interface cards (NM/Network Modules and SM/Service Modules), allowing future expansion for additional ports, enhanced security, voice modules, and WAN optimization services without replacing the entire unit.

Application Optimization and Services

Supports Cisco Application Experience (AppX) features such as application visibility, performance monitoring, and traffic prioritization to improve delivery of business‑critical applications and services.

Advanced Routing Protocol Support

Includes support for industry‑standard routing protocols such as OSPF, EIGRP, BGP, and policy‑based routing, enabling dynamic route management and optimized traffic paths across complex network topologies.

Simplified Management and Automation

Offers centralized management through Cisco DNA Center, Cisco IOS XE CLI, SNMP, and web‑based interfaces, simplifying configuration, monitoring, and troubleshooting for IT administrators.

Product Specifications

• Brand: Cisco
• Series: Integrated Services Router (ISR 4000 Series)
• Model: ISR4331/K9
• Product Type: Enterprise Edge Router
• Routing Performance: Up to 100 Mbps to 300+ Mbps depending on services
• WAN Interfaces: Dual onboard Gigabit Ethernet RJ45
• LAN Interfaces: Multiple Gigabit Ethernet ports
• Modular Slots: Network Module and Service Module support
• Security Features: Built‑in firewall, VPN (IPsec), secure DNS, intrusion prevention
• Voice/Unified Communications: Supported with appropriate modules
• Routing Protocols: OSPF, EIGRP, BGP, RIP, Policy‑based routing
• QoS: Advanced Quality of Service supported
• Management: Cisco IOS XE, CLI, SNMP, Cisco DNA Center support
• Power Supply: Internal power supply
• Mounting: Rack mountable (with optional kit)
• Dimensions: Standard 1RU enterprise form factor
• Deployment Environment: Indoor enterprise networks, branch offices, distributed sites
• Recommended Use: Secure WAN connectivity, VPN aggregation, unified communications, cloud access, application optimization
• Country Relevance: Optimized for secure and scalable enterprise network connectivity in Kenya

The Cisco ISR4331/K9 Integrated Services Router delivers secure, resilient routing, advanced services integration, and flexible connectivity, making it an ideal solution for enterprise networks, branch offices, and modern business environments across Kenya.