The Cisco Integrated Services Router 4331 ISR4331-K9 is a modular branch and WAN aggregation router designed for medium-to-large enterprise branch offices. With three NIM slots for WAN expansion, built-in 3x1G LAN ports, and hardware-accelerated IPsec VPN, it supports Cisco IOS XE, SD-WAN, and advanced security features.
- WAN/NIM Slots: 3 x NIM (Network Interface Module) slots for WAN expansion
- Built-in LAN Ports: 3 x 1G Ethernet (2x copper + 1x SFP)
- Maximum Throughput: Up to 300 Mbps aggregated
- Encryption: Hardware-accelerated IPsec VPN
- OS: Cisco IOS XE
- SD-WAN: Cisco SD-WAN (vManage/Viptela) compatible
- High Availability: Dual PSU option, redundant NIMs
- Form Factor: 1U rack-mount
Available refurbished from Networkser — fully tested for routing, NIM slots, and VPN performance.