Cisco ISR4431-V/K9 Enterprise Voice Integrated Services Router

• Enterprise branch office WAN connectivity
• Corporate VoIP and unified communications deployment
• Multi-site SD-WAN migration projects
• Secure VPN connectivity for remote offices
• Retail chain network consolidation
• Healthcare network connectivity with secure communications
• Financial institution branch networking
• Government office infrastructure modernization
• Campus edge routing with modular expansion
• Disaster recovery and business continuity network deployment

• Integrated Cisco ISR 4000 Series enterprise routing platform
• Voice-enabled bundle for unified communications deployments
• Supports aggregate throughput from 500 Mbps up to 1 Gbps
• Four integrated Gigabit Ethernet interfaces
• Three Network Interface Module expansion slots
• One Integrated Services Card slot for additional services
• Modular architecture supporting future infrastructure expansion
• Designed for secure WAN and branch connectivity
• Supports hybrid cloud connectivity strategies
• Optimized for virtualization-enabled enterprise environments
• High availability architecture for business-critical operations
• Flexible deployment across distributed enterprise locations
• Simplifies infrastructure modernization initiatives
• Supports operational efficiency through platform consolidation
• Provides long-term investment protection with modular scalability

• Brand: Cisco
• Part Number: ISR4431-V/K9
• Product Family: Cisco ISR 4000 Series Integrated Services Routers
• Product Model: ISR4431-V/K9
• Product Description: Cisco ISR 4431 Voice Integrated Services Router
• Aggregate Throughput: 500 Mbps to 1 Gbps
• Integrated Gigabit Ethernet Ports: 4
• RJ-45 Ports: 4
• SFP Ports: 4
• Network Interface Module (NIM) Slots: 3
• Integrated Services Card (ISC) Slot: 1
• Data Plane Memory: 2 GB Default
• Control/Services Memory: 4 GB Default
• Maximum Control/Services Memory: 16 GB
• Flash Memory: 8 GB Default
• Maximum Flash Memory: 32 GB
• USB 2.0 Type-A Ports: 2
• USB Console Port: 1
• RJ-45 Console Port: 1
• RJ-45 Auxiliary Port: 1
• Power Supply Options: Internal AC, DC, or PoE
• Online Insertion and Removal (OIR): Supported
• Rack Height: 1 RU
• Form Factor: Rack Mount
• Compatibility: Cisco IOS XE Software

WHY CHOOSE THIS PRODUCT?

• Organizations choose the Cisco ISR4431-V/K9 when they need a scalable branch router that combines enterprise routing, secure WAN connectivity, and integrated voice services in a single modular platform. Compared with smaller ISR 4321 and ISR 4331 models, it offers higher forwarding capacity, additional onboard Gigabit Ethernet interfaces, and greater expansion flexibility through three NIM slots, making it suitable for growing branch networks. Its compatibility with Cisco IOS XE, modular upgrade path, support for hybrid cloud initiatives, and ability to consolidate networking and voice infrastructure help reduce operational complexity, improve ROI, simplify procurement decisions, and extend infrastructure lifecycle while supporting future business growth.