Cisco ISR4331/K9 Integrated Services Router — Enterprise Branch Routing at a Fraction of the Cost
Save up to 70% over new pricing on this refurbished Cisco ISR 4331 router. Ideal for medium branch offices, the ISR4331/K9 delivers enterprise-class routing, security, and SD-WAN readiness in a compact 1RU form factor — backed by Reef Telecom's industry-leading 10-year warranty.
Key Specifications
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Throughput: 100 Mbps default, upgradeable to 300 Mbps with performance license
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WAN/LAN Ports: 3 onboard Gigabit Ethernet (1 combo RJ-45/SFP + 1 RJ-45 + 1 SFP)
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Expansion: 2 NIM slots, 1 ISC slot (PVDM4), 1 SM-X slot (single/double-wide)
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Memory: 4 GB DRAM (expandable to 16 GB) / 4 GB Flash (expandable to 16 GB)
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Software: Cisco IOS XE with IP Base license
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Form Factor: 1RU rack-mountable
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Power: Internal AC, up to 250W; optional PoE support
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Security: Zone-based firewall, IPsec/SSL VPN, DMVPN, GETVPN
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Routing Protocols: OSPF, BGP, EIGRP, IS-IS, static IPv4/IPv6
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Management: Cisco DNA Center, CLI, SNMP, RESTCONF, SD-WAN (vManage) ready
Why Buy from Reef Telecom?
- ✅ 10-Year Warranty — the longest in the refurbished telecom industry
- ✅ Free Shipping on orders over $300
- ✅ Every unit professionally tested and certified before shipment
- ✅ Trusted by enterprise IT teams nationwide
Ideal Use Cases
The Cisco 4331 ISR is perfect for enterprise branch offices, SD-WAN deployments, MPLS/internet dual-connectivity, VPN concentrators, and unified communications (SRST/CME). Its modular design consolidates WAN, security, voice, and application services onto a single platform — reducing appliance sprawl and simplifying management.
