ISR4331-V/K9 Cisco ISR 4331 UC Bundle, PVDM4-32, UC License

Cisco ISR4331-V/K9 - Overview

The ISR 4331 is a mid-tier model in the ISR 4000 family, designed for medium branch offices that need more throughput and modular expansion than the ISR4321. The V bundle adds voice and collaboration capabilities, making it a converged solution for both WAN routing and branch-level communications.

🔧 Key Hardware Specifications

• Form Factor: 1RU rack-mountable router
• Performance:
  • 100 Mbps default throughput
  • Upgradeable to 300 Mbps with performance license
• Interfaces:
  • 2x RJ45/SFP combo Gigabit Ethernet WAN/LAN ports
    
  • 2x NIM (Network Interface Module) slots
  • 1x SM (Service Module) slot
  • 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

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 if WAN connectivity to HQ is lost
• 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