Cisco ISR4451-X-VSEC/K9 Integrated Services Router

Equipment Overview

The Cisco ISR4451-X-VSEC/K9 is a modular enterprise router from the Cisco ISR 4000 series, delivered as a VSEC bundle that includes a PVDM4-64 digital signal processor module and unified communications (UC) and security (SEC) software licenses. The platform is designed for medium-to-large branch offices and enterprise edge deployments, providing integrated routing, security, and voice services in a single chassis. It supports concurrent processing of WAN traffic, VPN sessions, and voice media streams, making it suitable for converged network infrastructures requiring high availability and service flexibility.

Main Parameters

• Model / MPN: ISR4451-X-VSEC/K9
• Bundle Content: VSEC (Video, Security, Unified Communications) bundle with PVDM4-64 module
• Included Licenses: UC (Unified Communications) and SEC (Security) licenses
• Form Factor: Rack-mountable modular router
• Chassis Class: Cisco ISR 4000 series
• Voice Processing: Integrated PVDM4-64 packet voice data module for TDM/voice gateway functions
• Service Support: Concurrent routing, security (firewall/VPN), and voice media processing

Key Advantages

This model is selected for enterprise projects requiring a converged WAN gateway with built-in voice and security capabilities, eliminating the need for separate appliances. The pre-configured UC and SEC licenses reduce deployment time and simplify licensing management. The modular PVDM4-64 provides dedicated DSP resources, ensuring predictable voice quality even under data load. The ISR4451-X chassis offers expansion slots for future service module upgrades, supporting long-term scalability.

Compatibility & Integration

The router integrates with Cisco IOS XE software and standard networking protocols (BGP, OSPF, MPLS, VRF) for enterprise WAN environments. Its voice capabilities are compatible with Cisco Unified Communications Manager and SIP trunking. The security license enables IPsec VPN, firewall, and Cisco TrustSec integration. The platform supports standard SFP/SFP+ optics and interfaces with existing Cisco switching and security ecosystems.