ISR4431 VSEC K9 Integrated Services Router with UC and Threat Defense

Product Overview
The Cisco ISR4431-VSEC/K9 is a fully integrated voice and security router from the Cisco ISR 4000 Series, designed for medium-to-large enterprise branches that require unified communications, advanced threat protection, and SD-WAN readiness in a single device. This model includes both Voice (UC) and Security (SEC) technology licenses, enabling IP telephony, IPsec VPN, zone-based firewall, application control, and TDM voice gateway functionality, with performance scalable from 500 Mbps up to 1 Gbps via license.

Product Details

Product Features

Combines voice services and security functions in one platform for converged branches

Supports Cisco Unified Communications with SRST, CME, and DSP modules

Embedded IPsec VPN, zone-based firewall, and application visibility (AVC)

Performance-on-demand model: scale throughput as needed up to 1 Gbps

Full SD-WAN capabilities: segmentation, cloud on-ramp, application-aware routing

Ideal for secure and voice-rich branch environments requiring high reliability

Modular expandability with LTE, T1/E1, FXO/FXS, UCS-E compute, and more

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