ISR4431-V/K9 Cisco ISR 4431 UC Bundle, PVDM4-64, UC License

Cisco ISR4431-V/K9 - Overview

The Cisco ISR4431-V/K9 is a 1RU modular router from the Cisco 4400 Series, designed for medium to large branch offices and regional aggregation sites. Compared to the ISR4351, it offers higher throughput and scalability. The V bundle ensures that voice and collaboration services are enabled from the start, making it a converged platform for WAN routing and unified communications.

🔧 Key Hardware Specifications

• Form Factor: 1RU rack-mountable router
• Performance:
  • 500 Mbps default throughput
  • Upgradeable to 1 Gbps or 2 Gbps with performance licenses
• Interfaces:
  • 4x RJ45/SFP combo Gigabit Ethernet WAN/LAN ports
  • 3x NIM (Network Interface Module) slots
  • 1x ISC (Internal Services Card) slot
• Memory/Storage:
  • 4 GB DRAM (upgradeable to 16 GB)
  • 4 GB flash (upgradeable to 16 GB)
• Software: Runs Cisco IOS XE
• Power: Dual redundant PSU options available

🎤 V Bundle Features

The Voice license package enables:

• Cisco Unified Communications Manager Express (CME): Embedded call control for branch PBX functionality
• Cisco Survivable Remote Site Telephony (SRST): Ensures voice continuity during WAN outages
• Voice Gateway Services: SIP, H.323, MGCP, plus analog/digital voice interface support (via NIMs)
• Integrated Conferencing and Messaging: Branch-level collaboration services
• Secure Voice: Encryption and secure signaling for compliance

🧩 Ideal Use Cases

• Branch offices needing local call control and survivability
• Enterprises deploying hybrid UC solutions with centralized and branch-level voice
• Retail or distributed sites requiring integrated voice/video alongside WAN routing
• Organizations consolidating routing and UC into a single ISR platform