Cisco ISR4351-AXV/K9 Router – High-Performance Enterprise Edge

What It Is

The Cisco ISR4351-AXV/K9 is a mid-range integrated services router from the Cisco ISR 4000 series, designed for enterprise branch offices and medium-sized deployments. This model is an AXV bundle that includes a PVDM4-64 voice/fax digital signal processor module, along with pre-installed Security (SEC) and Unified Communications (UC) software licenses, enabling converged routing, security, and voice services in a single chassis.

Technical Details

• Form Factor: 2RU modular router supporting dual NIM slots and service module expansion
• Processor: Multicore CPU architecture for concurrent services (routing, security, voice)
• Memory: 8 GB DRAM and 4 GB flash storage
• Interfaces: 3x GE WAN/LAN ports (1 GE combo, 2 GE fixed)
• Voice Module: PVDM4-64 digital signal processor (64-channel capacity) for voice and conferencing
• Licenses: SEC (security) and UC (unified communications) license bundles pre-activated
• Software: Cisco IOS XE operating system with IP Base feature set

Configuration & Options

• Included: ISR4351 chassis, PVDM4-64 module, SEC and UC license files
• Expansion: Two NIM (Network Interface Module) slots for additional WAN, voice, or compute modules
• Service Modules: Optional internal service module bay for packet processing acceleration
• Power: Dual integrated power supplies (AC or DC options) for redundancy
• Compatibility: Supports Cisco Unified Communications Manager and Cisco Unified Border Element

Operating Conditions

The ISR4351-AXV/K9 is intended for deployment in enterprise branch offices, regional headquarters, and colocation facilities that require integrated routing, security, and voice services. It operates in temperature-controlled indoor environments (standard NEBS/ETSI compliance) and is suitable for 19-inch rack mounting. The device is designed for always-on operation with redundant power and modular hardware, supporting service provider and enterprise WAN edge architectures.