ISR4451-X-VSEC/K9 Cisco ISR 4451 Voice Sec. Bundle, PVDM4-64 w/UC and SEC License PAK

Cisco ISR4451-X-VSEC/K9 - Overview

The Cisco ISR4451-X-VSEC/K9 is a high-performance 2RU modular router from the Cisco 4450 Series, designed for large branch offices, regional hubs, and enterprise WAN edge deployments. Compared to the ISR4431, it delivers significantly higher throughput and expansion capacity. The VSEC bundle combines Voice and Security services, enabling converged WAN routing, unified communications, and advanced encryption/firewall capabilities in a single platform.

🔧 Key Hardware Specifications

• Form Factor: 2RU rack-mountable router
• Performance:
  • 1 Gbps default throughput
  • Upgradeable to 2 Gbps or 4 Gbps with performance licenses
• Interfaces:
  • 4x RJ45/SFP combo Gigabit Ethernet WAN/LAN ports
  • 3x NIM (Network Interface Module) slots
  • 2x SM-X (Service Module) slots
  • 1x ISC (Internal Services Card) slot
• Memory/Storage:
  • 4 GB DRAM (upgradeable to 16 GB)
  • 8 GB flash (upgradeable to 32 GB)
• Software: Runs Cisco IOS XE
• Power: Dual redundant PSU options available

🎤 VSEC Bundle Features

The Voice + Security 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
• Advanced Security Services: VPN, firewall, and hardware-accelerated encryption included

🧩 Ideal Use Cases

• Large branch offices needing local call control and survivability
• Enterprises deploying hybrid UC solutions with centralized and branch-level voice
• Organizations requiring secure WAN edge with integrated VPN/firewall
• Retail or distributed sites consolidating routing, UC, and security into one ISR platform