Cisco ISR4351/K9 — Enterprise-Grade Integrated Services Router

Save up to 80% over new with this professionally refurbished Cisco 4351 ISR. Ideal for medium to large branch offices, this rack-mountable router delivers 200–400 Mbps of aggregate throughput with built-in WAN optimization, security, and unified communications — all backed by Reef Telecom's industry-leading 10-year warranty.

Key Specifications

• Part Number: ISR4351/K9
• Onboard Ports: 3x Gigabit Ethernet (RJ-45/SFP combo)
• NIM Slots: 3 (for WAN, voice, or LTE modules)
• Service Module Slots: 2x SM-X
• ISC Slot: 1 onboard
• Memory: 4 GB DRAM (expandable to 16 GB) / 4 GB Flash
• Throughput: 200–400 Mbps (license upgradeable)
• Operating System: Cisco IOS XE with SD-WAN support
• Form Factor: 2U Rack-Mountable
• Power: AC power supply included; supports redundant PSU

Built-In Enterprise Features

• IPSec/SSL VPN, Zone-Based Firewall, and Intrusion Prevention
• Application Visibility and Control (AVC) with QoS
• Cisco Intelligent WAN (IWAN) and SD-WAN ready
• Voice gateway support with optional PVDM4 modules
• Programmable APIs and centralized management via Cisco DNA Center

Why Buy from Reef Telecom?

• 10-Year Warranty on all refurbished equipment
• Free Shipping on orders over $300
• Every unit professionally tested, cleaned, and restored to full functionality
• Trusted B2B telecom equipment supplier

The Cisco ISR4351/K9 is the ideal WAN edge platform for enterprises consolidating routing, security, voice, and WAN optimization into a single branch-office device. Compatible with Cisco NIM, SM-X, and ISC modules for flexible expansion as your network grows.

Condition

Certified Refurbished

Warranty

10-Year Reef Telecom Warranty

Manufacturer Part Number

ISR4351/K9

Reef SKU

ISR4351/K9-R

UPC

882658710537

Brand

Cisco

Free ground shipping on orders over $300 (contiguous US). Same-day dispatch on orders placed before 4 PM EST.

All products include our industry-leading 10 Year Warranty backed by Reef Telecom.