Cisco ISR4321-V/K9 Integrated Services Voice Router

• Branch-office WAN routing and enterprise connectivity
• Unified Communications deployments at remote offices
• Voice gateway infrastructure for Cisco-based telephony environments
• Small and midsize branch network aggregation
• Enterprise IP telephony and voice-service deployments
• Branch infrastructure supporting both data and voice traffic
• Cisco network refresh and replacement projects
• Distributed enterprise offices requiring modular WAN connectivity
• Legacy voice-router replacement within Cisco environments
• Branch modernization projects requiring NIM-based expansion

• Cisco ISR 4000 Series branch-router architecture
• Cisco ISR4321 platform
• 2 Gigabit Ethernet interfaces
• 2 NIM expansion slots
• Unified Communications licensing included in the V bundle
• PVDM4 voice-processing capability associated with the Voice bundle
• Cisco IOS IP Base software foundation
• Integrated routing and voice infrastructure
• Designed for enterprise branch-office deployments
• Supports modular network-interface expansion through NIM slots
• Suitable for combined voice and data networking
• Compact branch infrastructure platform
• Supports Cisco Unified Communications deployment scenarios
• Suitable for Cisco-based voice gateway architectures
• Provides a migration path for existing ISR4321 voice deployments, subject to lifecycle and compatibility requirements 

• Brand: Cisco
• Part Number: ISR4321-V/K9
• Product Family: Cisco 4000 Series Integrated Services Routers
• Product Type: Integrated Services Router
• Platform: Cisco ISR 4321
• Ethernet Ports: 2 x Gigabit Ethernet
• NIM Slots: 2
• SM/SM-X Slots: None
• PVDM Slot: 1
• Software: Cisco IOS IP Base
• Voice Capability: Unified Communications
• Bundle Type: Voice Bundle
• UC License: Included
• Voice DSP: PVDM4
• Rack Mount: Supported
• Product Status: End of Sale
• End-of-Sale Date: November 7, 2023
• End-of-Support Date: November 30, 2028 

WHY CHOOSE THIS PRODUCT?

• The Cisco ISR4321-V/K9 is primarily attractive to organizations that already operate Cisco ISR4321 infrastructure and specifically require the voice-enabled configuration rather than the standard ISR4321/K9. Its two Gigabit Ethernet ports, two NIM slots and UC-oriented bundle provide a compact platform for combining branch routing with enterprise voice services. The V configuration is differentiated from the base model by its Unified Communications licensing and voice-processing capability, while higher ISR 4000 models such as the ISR4331 provide greater interface and expansion capacity for larger branch requirements. For procurement, this SKU is best considered for compatible replacement, maintenance or lifecycle-extension scenarios rather than new platform investment, because Cisco has announced the ISR4321 end of sale and identifies the Catalyst C8200-1N-4T as its replacement. Buyers should therefore verify software licensing, voice-module requirements, existing NIM/PVDM compatibility and the remaining support lifecycle before purchasing.