Cisco ISR4331/K9 4331 Integrated Services Router

The Cisco ISR4331/K9 4331 Integrated Services Router is a high-performance enterprise-grade router designed to deliver secure WAN connectivity, advanced routing services, and scalable application performance for branch offices and mid-sized organizations. As part of the Cisco 4000 Series Integrated Services Routers, the ISR4331 combines intelligent WAN, strong security features, application optimization, and modular expandability in a compact 1U form factor. It supports voice, video, data, and cloud applications while enabling centralized management and simplified network operations.

Product Features

High-Performance WAN Routing

Delivers strong throughput performance with support for advanced routing protocols, ensuring reliable and efficient traffic forwarding across enterprise WAN environments.

Modular and Scalable Architecture

Equipped with Network Interface Modules (NIM) and Service Module support, allowing flexible expansion for WAN, LAN, voice, and security services.

Integrated Security Services

Provides built-in security capabilities including IPsec VPN, firewall features, access control lists, and secure segmentation to protect business traffic.

Application-Aware Networking

Supports Quality of Service, traffic shaping, and application visibility to optimize performance for critical applications such as VoIP and cloud services.

Unified Communications Support

Designed to support voice gateway functions and collaboration services for businesses requiring integrated communications.

Centralized Management

Managed via Cisco IOS XE with support for CLI, SNMP, NetFlow, and compatibility with Cisco DNA Center and other network management platforms.

Product Specifications

• 3 x 10/100/1000 Gigabit Ethernet RJ-45 ports
• 2 x Network Interface Module (NIM) slots
• 1 x Service Module slot
• 1 x USB 3.0 port and 1 x USB 2.0 port
• 1 x RJ-45 console port and 1 x mini-USB console port
• Throughput performance: Up to 100 Mbps default, scalable with performance license
• DRAM: 4 GB default, expandable
• Flash memory: 4 GB default
• Rack height: 1U rack-mountable
• Operating system: Cisco IOS XE
• VPN support: IPsec, SSL VPN
• Routing protocols: OSPF, EIGRP, BGP, RIP, IS-IS
• Power supply: Internal power supply
• Operating temperature: 0°C to 40°C