Cisco ISR4331/K9 4331 Integrated Services Router

The Cisco ISR4331/K9 4331 Integrated Services Router is a high-performance enterprise networking solution designed to deliver secure, reliable, and scalable connectivity for growing businesses, branch offices, educational institutions, financial organizations, and government agencies. Built as part of Cisco’s trusted Integrated Services Router (ISR) 4000 Series, the ISR4331/K9 combines advanced routing, integrated security, VPN capabilities, and application optimization into a single powerful platform.

Whether you are expanding your organization’s network infrastructure or replacing legacy networking equipment, the Cisco ISR4331/K9 provides exceptional performance, enterprise-grade security, and flexible deployment options. It enables businesses to securely connect remote offices, cloud applications, and headquarters while maintaining high availability and simplified network management.

At Neriahtech Computers Ltd, we supply genuine Cisco networking equipment backed by professional technical support and competitive pricing across Kenya.

Why Choose the Cisco ISR4331/K9?

Modern businesses require network infrastructure that can adapt to increasing traffic, cloud services, VoIP communications, and remote work environments. The Cisco ISR4331/K9 is engineered to meet these demands by offering secure WAN connectivity, intelligent traffic management, and integrated network services without requiring multiple standalone appliances.

With Cisco’s renowned reliability and enterprise-level architecture, this router helps reduce operational complexity while improving overall network efficiency.

Key Features of Cisco ISR4331/K9

• Enterprise-class Integrated Services Router
• 100 Mbps aggregate throughput
• Advanced integrated security services
• Secure VPN support for remote connectivity
• Multiple Gigabit Ethernet interfaces
• Integrated SFP connectivity
• Modular and scalable architecture
• 4 GB DDR3 system memory
• 4 GB Flash storage
• Rack-mountable 1RU design
• USB Type-A and Mini-USB connectivity
• RJ45 Console management port
• High PoE power budget of 530W
• Cloud-ready networking platform
• Ideal for branch offices and enterprise deployments
• Cisco IOS XE operating system compatibility
• Reliable long-life enterprise hardware
• MTBF of approximately 587,250 hours

High-Performance Enterprise Routing

The Cisco ISR4331/K9 delivers dependable routing performance designed for organizations that require uninterrupted business operations. With a forwarding throughput of 100 Mbps, it efficiently supports data, voice, video, and cloud-based applications simultaneously.

Its intelligent routing capabilities ensure optimized traffic flow while maintaining excellent application performance across distributed enterprise environments.

The router is an excellent choice for organizations implementing hybrid work environments, secure branch networking, and centralized IT infrastructure.

Flexible Network Connectivity

The Cisco ISR4331/K9 offers multiple connectivity options that make network deployment flexible and future-ready.

Available Interfaces

• 1 × 10/100/1000 Gigabit Ethernet RJ45 Port
• 1 × Gigabit SFP Port
• 1 × Gigabit Combo Ethernet/SFP Port
• RJ45 Console Port
• Ethernet Management Port
• Mini-USB Port
• USB Type-A Port

These interfaces provide administrators with flexibility for fiber and copper deployments while simplifying network expansion.

Integrated Security for Modern Businesses

Cybersecurity is an essential requirement for today’s connected organizations. The Cisco ISR4331/K9 integrates advanced security technologies that help protect sensitive business data while maintaining secure communications between offices and remote users.

Security capabilities support:

Secure VPN Connectivity

Create encrypted site-to-site and remote-access VPN tunnels for employees working remotely or branch office communications.

Threat Protection

Reduce exposure to cyber threats through Cisco’s integrated security architecture.

Secure WAN Access

Protect internet traffic and maintain compliance with enterprise networking standards.

Reliable Hardware Designed for Continuous Operation

Built with enterprise reliability in mind, the Cisco ISR4331/K9 is engineered to operate continuously in demanding environments.

Key hardware specifications include:

Memory

• 4 GB DDR3 RAM

Storage

• 4 GB Flash Memory

Rack Size

• 1RU Rack Mount

Weight

• 7.3 kg

MTBF

Approximately 587,250 hours, demonstrating exceptional long-term reliability for business-critical deployments.

Efficient Power Management

The router supports enterprise power requirements while providing a generous 530W PoE power budget, making it suitable for environments with connected IP phones, wireless access points, and other powered network devices.

Power Specifications

• AC Input: 100–240 VAC
• Frequency: 50/60 Hz
• Maximum Power Draw: 530W

Built for Challenging Environments

The Cisco ISR4331/K9 is designed to operate reliably across a wide range of environmental conditions.

Operating Conditions

• Temperature: 0°C to 40°C
• Humidity: 5%–85%
• Altitude: Up to 3,050 meters

Storage Conditions

• Temperature: -40°C to 70°C
• Humidity: 5%–95%

This makes it suitable for enterprise server rooms, communication cabinets, educational institutions, industrial environments, and branch office deployments.

Ideal Applications

The Cisco ISR4331/K9 is suitable for:

• Corporate branch offices
• Government institutions
• Universities and colleges
• Banks and financial institutions
• Hospitals
• Manufacturing companies
• Internet service providers
• Retail chains
• Hotels
• Data centers
• Cloud networking environments
• Multi-site enterprise organizations

Technical Specifications

Model

Cisco ISR4331/K9

Router Series

Cisco ISR 4000 Series

Throughput

100 Mbps

Memory

4 GB DDR3

Flash Storage

4 GB

Network Ports

• 1 × Gigabit Ethernet RJ45
• 1 × Gigabit SFP
• 1 × Combo Gigabit Ethernet/SFP
• Console RJ45
• Ethernet Management Port
• Mini-USB
• USB Type-A

Power

• Maximum Draw: 530W
• AC Input: 100–240 VAC

Rack Size

1RU

Dimensions

44.45 × 438.15 × 438.15 mm

Weight

7.3 kg

Why Buy the Cisco ISR4331/K9 from Neriahtech Computers Ltd?

When you purchase from Neriahtech Computers Ltd, you receive genuine Cisco networking equipment supported by knowledgeable professionals committed to helping businesses deploy dependable IT infrastructure.

We offer:

• Genuine Cisco products
• Competitive pricing
• Professional networking advice
• Countrywide delivery across Kenya
• Responsive customer support
• Fast order processing
• After-sales assistance

Visit our website:
https://neriahtechcomputers.co.ke/

Contact us:

• Phone/WhatsApp: +254 113 81 81 82
• Email: neriahtechcomputers@gmail.com

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Invest in the Cisco ISR4331/K9 4331 Integrated Services Router today and build a secure, scalable, and high-performance enterprise network that is ready for the demands of modern business.