Cisco ISR4331/K9 4331 Integrated Services Router
The Cisco ISR4331/K9 4331 Integrated Services Router delivers enterprise-grade performance, advanced security, and scalability for branch offices and medium-sized networks. Powered by the Cisco IOS XE operating system, it provides high-speed WAN connectivity, cloud integration, and unified communication support — all in a compact, energy-efficient form factor.
Key Features
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High-Performance Architecture
Supports up to 100 Mbps to 300 Mbps aggregate throughput with upgradeable licenses for future scalability. -
Integrated Security
Built-in Cisco Zone-Based Firewall, VPN, and Unified Threat Management (UTM) ensure data protection and compliance. -
Advanced WAN and Cloud Services
Delivers intelligent WAN (IWAN), QoS, and application visibility to optimize traffic and enhance user experience. -
Unified Communications Ready
Supports voice, video, and collaboration services with optional UC licenses and PVDM modules. -
Flexible Interface Options
Includes 2 NIM slots, 1 SM slot, and 2 integrated Gigabit Ethernet ports for modular expansion. -
Energy Efficient & Reliable
Designed with redundant power options and smart cooling to ensure consistent uptime and long-term reliability.
Specifications
| Feature | Specification |
|---|---|
| Model | Cisco ISR4331/K9 |
| Series | ISR 4000 Series |
| Aggregate Throughput | 100 Mbps – 300 Mbps (License Upgradeable) |
| WAN Interfaces | 2 × Gigabit Ethernet |
| NIM Slots | 2 |
| SM Slot | 1 |
| Flash Memory | 4 GB (Default) |
| DRAM | 4 GB (Default) |
| Power Supply | Internal (AC) |
| Rack Units | 1U |
| Operating System | Cisco IOS XE |
| Security Features | Firewall, VPN, IPSec, UTM |
| Dimensions (W × D × H) | 438 × 438 × 44 mm |
| Weight | Approx. 5.6 kg |
| Warranty | 1 Year Limited Warranty |
What’s in the Box
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1 × Cisco ISR4331/K9 Router
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1 × Power Cable
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1 × Rack Mount Kit
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1 × Documentation Set
Why Choose Cisco ISR4331/K9
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Enterprise-class performance for modern branch networks
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Modular scalability to meet growing network demands
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Integrated voice, data, and security in one platform
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Seamless cloud and SD-WAN integration
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Trusted Cisco reliability and support
Mike –
A bit complex to set up, but worth it for the performance. The VPN capabilities are excellent. It’s an investment, but it pays off in reliability.
Akinyi –
Support from Cisco is always helpful. The throughput is incredible, no bottlenecks. The command-line interface is powerful for experts.
Awino –
Integration with other Cisco gear is seamless. It’s a high-performance machine, no compromises. Reliable and stable, never goes down.