Cisco ISR4331/K9 Integrated Services Router — 3x GE, 2 NIM Slots, 100-300 Mbps, Refurbished
Warranty: Lifetime
The workhorse branch router — three gigabit ports and two NIM slots for WAN and voice expansion
Cisco ISR4331/K9 — ISR 4000 Series, 3x GE onboard, 2 NIM slots, 1RU
→ Base bundle, not SEC. This is the base ISR4331/K9. The Cisco ISR4331-SEC/K9 adds the security license.
Part Number: ISR4331/K9
SKU: ISR4331/K9-R
Description: Cisco ISR 4331 router, 3 GE, 2 NIM, 1 SM slot
The ISR4331 routes at 100 Mbps aggregate, or 300 Mbps with Cisco's performance license. Three onboard GE ports include two RJ-45 and two SFP, with one combo port shared between them.
Two NIM slots take WAN, voice and switch modules such as the NIM-1GE-CU-SFP or NIM-ES2-8.
Which One Do I Need?
| Model | Throughput | NIM slots |
|---|---|---|
| Cisco ISR4321/K9 | 50 Mbps (100 with license) | 2 |
| ISR4331/K9 — this listing | 100 Mbps (300 with license) | 2 |
| C8200-1N-4T | Up to 3.8 Gbps IPv4 | 1 NIM + 1 PIM |
End of sale. Cisco has announced end of sale for the ISR 4000 Series; the Catalyst 8200 is the successor.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | ISR4331/K9 |
| Throughput | 100 Mbps; 300 Mbps with performance license |
| Onboard GE | 3 (2x RJ-45, 2x SFP, one combo) |
| NIM slots | 2 |
| Form factor | 1RU |
| Weight | 13.5 lb with AC supply |
| Condition | Refurbished |
| Warranty | Lifetime, backed by Resilient Tec |
Source: Cisco 4000 Series ISR data sheet.
Good to Know
- License as shipped. Ask us which licenses are on the unit before you order.
- NIMs separate. Slots ship empty unless stated.
Quick Checklist — Is This the Right Router?
You need a branch router with three GE ports, two NIM slots and up to 300 Mbps with the performance license.
Availability
Refurbished and tested · Ships from Resilient Tec in Knoxville, TN · Free standard shipping on US orders.
We confirm stock and lead time with you before an order ships. Need several, or a matching set? Request a quote →
Warranty: lifetime, backed by Resilient Tec — not a manufacturer term. When something fails you reach a named seller in the US, not a ticket queue.
You Might Also Need
- NIM-1GE-CU-SFP — extra GE WAN port
- Cisco NIM-2GE-CU-SFP
- Cisco ISR4331-SEC/K9
Related Guides
The workhorse branch router — three gigabit ports and two NIM slots for WAN and voice expansion
Cisco ISR4331/K9 — ISR 4000 Series, 3x GE onboard, 2 NIM slots, 1RU
→ Base bundle, not SEC. This is the base ISR4331/K9. The Cisco ISR4331-SEC/K9 adds the security license.
Part Number: ISR4331/K9
SKU: ISR4331/K9-R
Description: Cisco ISR 4331 router, 3 GE, 2 NIM, 1 SM slot
The ISR4331 routes at 100 Mbps aggregate, or 300 Mbps with Cisco's performance license. Three onboard GE ports include two RJ-45 and two SFP, with one combo port shared between them.
Two NIM slots take WAN, voice and switch modules such as the NIM-1GE-CU-SFP or NIM-ES2-8.
Which One Do I Need?
| Model | Throughput | NIM slots |
|---|---|---|
| Cisco ISR4321/K9 | 50 Mbps (100 with license) | 2 |
| ISR4331/K9 — this listing | 100 Mbps (300 with license) | 2 |
| C8200-1N-4T | Up to 3.8 Gbps IPv4 | 1 NIM + 1 PIM |
End of sale. Cisco has announced end of sale for the ISR 4000 Series; the Catalyst 8200 is the successor.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | ISR4331/K9 |
| Throughput | 100 Mbps; 300 Mbps with performance license |
| Onboard GE | 3 (2x RJ-45, 2x SFP, one combo) |
| NIM slots | 2 |
| Form factor | 1RU |
| Weight | 13.5 lb with AC supply |
| Condition | Refurbished |
| Warranty | Lifetime, backed by Resilient Tec |
Source: Cisco 4000 Series ISR data sheet.
Good to Know
- License as shipped. Ask us which licenses are on the unit before you order.
- NIMs separate. Slots ship empty unless stated.
Quick Checklist — Is This the Right Router?
You need a branch router with three GE ports, two NIM slots and up to 300 Mbps with the performance license.
Availability
Refurbished and tested · Ships from Resilient Tec in Knoxville, TN · Free standard shipping on US orders.
We confirm stock and lead time with you before an order ships. Need several, or a matching set? Request a quote →
Warranty: lifetime, backed by Resilient Tec — not a manufacturer term. When something fails you reach a named seller in the US, not a ticket queue.
You Might Also Need
- NIM-1GE-CU-SFP — extra GE WAN port
- Cisco NIM-2GE-CU-SFP
- Cisco ISR4331-SEC/K9