The Cisco ISR4331-V/K9 Integrated Services Router is a Unified Communications (UC) bundle from the Cisco 4000 Series ISR, designed to deliver secure voice, video, and data services for enterprise branch environments. Combining advanced routing capabilities with integrated voice processing, this router provides a scalable and reliable platform for modern unified communications deployments.

The bundle includes a PVDM4-32 DSP module and Cisco UC License (CUBEE10), enabling advanced voice services such as IP telephony, conferencing, transcoding, and voice gateway functionality. With support for converged communications, the ISR4331-V/K9 helps organizations simplify infrastructure while improving collaboration and operational efficiency.

Powered by Cisco IOS XE, the router delivers scalable throughput from 100 Mbps to 300 Mbps and supports application-aware networking, advanced QoS, and secure WAN connectivity. It features 3 Gigabit Ethernet RJ45/SFP combo ports, along with 2 NIM slots, 1 SM-X service module slot, and 1 ISC slot for flexible expansion and customized deployments.

The integrated PVDM4-32 DSP module provides 32-channel voice processing, enabling high-quality VoIP services and unified communications applications across distributed branch networks. Advanced security capabilities including IPsec VPN, SSL VPN, firewall protection, and encryption help ensure secure enterprise connectivity.

Designed for flexibility and scalability, the ISR4331-V/K9 supports modern enterprise technologies including SIP trunking, VoIP, WAN optimization, routing protocols, and centralized network management.

Ideal for enterprise VoIP deployments, branch office voice gateways, unified communications infrastructures, secure WAN environments, and converged voice-video-data networks, the Cisco ISR4331-V/K9 delivers integrated communications, security, and routing performance in a compact enterprise platform.