Cisco ISR4431-VSEC/K9 Router – High-Performance Secure WAN Gateway

Usage Area

The Cisco ISR4431-VSEC/K9 is a modular enterprise router designed for medium to large branch offices and regional headquarters. It is deployed as a WAN aggregation point for converged voice, video, data, and security services. The integrated Unified Communications (UC) license enables deployment of Cisco Unified Communications Manager Express (CUCME) for IP telephony. The Security (SEC) license adds advanced firewall, VPN, and content filtering capabilities. Typical installations include distributed enterprise networks requiring high-availability routing and multiservice traffic handling.

Construction Features

• Chassis-based design with modular slots for NIM (Network Interface Module) and SM (Service Module) expansion.
• Integrated PVDM4-64 digital signal processor (DSP) module for voice and video processing.
• Dual embedded GE (Gigabit Ethernet) ports for WAN/LAN connectivity.
• Built-in hardware acceleration for IPsec VPN and cryptographic operations.
• Redundant power supply support and hot-swappable fan tray for serviceability.
• Rack-mountable 1RU form factor with front-to-back airflow.

Technical Parameters

• Model: ISR4431-VSEC/K9
• Bundle: UC (Unified Communications) and SEC (Security) licenses included
• DSP Module: PVDM4-64 (64-channel voice DSP)
• Flash Memory: 8 GB default (expandable)
• DRAM: 8 GB default (expandable)
• Router Slots: 2 NIM slots, 1 SM slot
• Embedded Ports: 2 x 1GE (RJ45) + 1 x GE management port

Standards & Certification

The router complies with EU directives for electromagnetic compatibility (EMC) and low voltage (LVD). It is certified to EN 55032, EN 55024, and EN 60950-1 safety standards. The product carries the CE mark, confirming conformity with applicable European Union regulations for commercial deployment.