ISR4331-VSEC/K9 Cisco ISR 4331 VSEC Bundle, PVDM4-32 w/UC, SEC Lic, CUBE-10

Cisco ISR4331-VSEC/K9 - Overview

The ISR 4331 is a mid-tier model in the ISR 4000 family, offering more performance and expansion than the 4321 while remaining compact. The VSEC bundle merges the Voice and Security feature sets, so customers get both collaboration and security capabilities pre-licensed.

🔧 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

VSEC Bundle Features

Voice Features (V license):

• 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

Security Features (SEC license):

• Zone-Based Firewall (ZBFW) - Stateful firewall with deep packet inspection
• VPN Services - IPsec, DMVPN, FlexVPN, SSL VPN
• Trustworthy Systems - Secure boot, image signing, runtime defenses
• Advanced Encryption - Strong cryptographic algorithms for compliance

🧩 Ideal Use Cases

• Branch offices needing both secure WAN connectivity and local voice/collaboration services
• Enterprises deploying hybrid UC solutions with centralized and branch-level voice
• Retail or distributed sites requiring VPN, firewall, and voice survivability in one device
• Organizations consolidating multiple functions (routing, security, UC) into a single ISR platform