Cisco ISR4331/K9-RF Integrated Services Router (Refurbished)

This remanufactured Cisco ISR 4331-K9 router provides robust networking with 3 Gigabit Ethernet ports (2 RJ-45, 2 SFP-based), 2 Network Interface Module (NIM) slots, and 1 Service Module (SM-X) slot for flexible expansion. It comes with 4GB DRAM and 4GB Flash memory (upgradable to 16GB for both). Key security features include integrated firewall, VPN (IPsec, SSL, FlexVPN), and Intrusion Prevention System (IPS). It also supports advanced voice and video services via PVDM4 DSP. Management options include CLI, Cisco DNA Center, and various console ports (USB Type A/B, serial, AUX).