Cisco ISR4331/K9 Router Condition: Refurbished / Used Type: Integrated Services Router (ISR 4000 Series) WAN Ports: 2 × Gigabit Ethernet (RJ-45/SFP), 1 × RJ-45 Expansion: 2 × NIM slots, 1 × SM slot Throughput: Up to 100 Mbps (upgradeable to 300 Mbps)
The Cisco ISR4331/K9 is a compact yet high-performance 1U rack-mount branch router from Cisco’s 4000 Series. Designed for small to medium-sized enterprises and branch offices, it delivers 100–300 Mbps aggregate throughput, supports SD-WAN, advanced security, and modular expansion. With hardware‑accelerated services and flexible licensing, it adapts to evolving network demands.
High Performance: Delivers 100–300 Mbps aggregate throughput with upgrade licenses available
Flexible Ports: Includes 3 onboard Gigabit Ethernet/WAN ports (combo RJ45/SFP)
Modular Slots: 1 SM‑X slot for single/double-wide service modules and 2 NIM slots; includes an onboard ISC slot for PVDM4 voice modules
Scalable Memory: 4 GB DDR3 ECC DRAM and 4 GB flash, both upgradable to 16 GB
Rich Security & VPN: Supports IPSec VPN, ACLs, NAT, firewall, and advanced QoS features
Compact Design: 1 RU form factor, weight ~12.96 kg, dimensions approx. 44.45 × 438.15 × 438.15 mm
Power Options: Internal AC and optional PoE power support; typical power draw ~42 W, max ~250 W
| Specification | Details |
|---|---|
| Model | Cisco ISR4331/K9 |
| Aggregate Throughput | 100–300 Mbps |
| Onboard Ports | 3 × 10/100/1000 ports (2× RJ‑45, 2× SFP in combo) |
| SM‑X Slot | 1 (single- or double‑wide support) |
| NIM Slots | 2 |
| ISC Slot | 1 (for PVDM4 voice support) |
| DRAM | 4 GB DDR3 ECC (upgradable to 16 GB) |
| Flash Memory | 4 GB (upgradable to 16 GB) |
| USB / Console Ports | USB‑A, mini‑USB, console RJ‑45, AUX |
| Power Supply Options | Internal AC; Optional PoE-support PSU |
| Power (Typical/Max) | ~42 W / up to ~250 W |
| Dimensions (HxWxD) | 44.45 × 438.15 × 438.15 mm |
| Weight (Package) | ~12.96 kg |