Cisco • SKU ISR4331/K9
Cisco ISR4331/K9 — ISR 4331
Cisco ISR 4331, 4000 Series Integrated Services Router, 3x GE WAN/LAN ports, 2x NIM slots, 1x SM slot, 4G Flash, 4G DRAM, IP Base license, rack-mount 1U
- End-of-sale — refurbished only
Download Cisco datasheet ↗ via Cisco official 4000 Series ISR datasheet (referenced in search results; cisco.com blocks WebFetch but URL confirmed via search snippet)
What is the Cisco ISR4331/K9?
Cisco ISR 4331, 4000 Series Integrated Services Router, 3x GE WAN/LAN ports, 2x NIM slots, 1x SM slot, 4G Flash, 4G DRAM, IP Base license, rack-mount 1U
TFI supplies the ISR4331/K9 refurbished to South African businesses, each unit covered by warranty and optional SLA. As a B-BBEE Level 2 distributor we can quote stock, lead time and price — usually within the same business day.
Specifications
| WAN/LAN ports | 3x Gigabit Ethernet (onboard) |
|---|---|
| SFP uplinks | 2x SFP (combo with 2 of the 3 GE ports) |
| Expansion slots | 2x NIM (Network Interface Module), 1x SM (Service Module), 1x ISC slot |
| Throughput | 100 Mbps base; scalable to 300 Mbps with performance license |
| Memory (DRAM) | 4 GB default; upgradable to 16 GB |
| Flash storage | 4 GB default; upgradable to 16 GB |
| License tier | IP Base (IPB) — entry-level IOS XE feature set |
| Form factor | 1U rack-mountable, 19-inch rack; 1.75 x 17.25 x 17.25 in (H x W x D) |
| Weight | Approx. 11 lbs (5 kg) — varies by configuration |
| PoE | None (no PoE on base unit; PoE available via NIM modules) |
| EoL status | End-of-Sale (EoS); last order date approx. October 2022. Replacement: Cisco Catalyst C8200-1N-4T |
End-of-life status
The ISR4331/K9 is end-of-sale
Cisco has declared the ISR4331/K9 end-of-sale, so it is no longer manufactured new. TFI supplies it professionally refurbished and tested.
Why refurbished still makes sense: a refurbished ISR4331/K9 delivers the same proven performance at a fraction of the new-equipment cost, backed by a TFI warranty and SLA. It is the practical choice for spares, expansion of an existing deployment, or extending the life of a network you are not ready to replace. Talk to us about a successor model if you are planning a refresh.
Frequently asked questions
- What is the Cisco ISR4331/K9?
- Cisco ISR 4331, 4000 Series Integrated Services Router, 3x GE WAN/LAN ports, 2x NIM slots, 1x SM slot, 4G Flash, 4G DRAM, IP Base license, rack-mount 1U
- Is the ISR4331/K9 still supported?
- The Cisco ISR4331/K9 has reached end-of-sale, so it is supplied refurbished. TFI back every refurbished unit with a warranty and SLA options, which makes it a cost-effective choice where the platform still fits your network.
- Can TFI deliver the ISR4331/K9 in South Africa?
- Yes. TFI is a South African distributor (B-BBEE Level 2) and ships the Cisco ISR4331/K9 nationwide. Send us the SKU and we come back with stock, lead time and price — usually the same business day.
Also in the Cisco ISR4300 Series Routers
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ACS-4320-BEZEL
Cisco ISR 4320 Series Front Bezel — decorative/protective front panel accessory for ISR 4321 and ISR 4331 routers, 1U rack-mount form factor
-
ACS-4320-FanASSY
Cisco ISR 4330 Fan Assembly, Spare — FRU hot-swap fan tray for the ISR 4330 (ISR 4300 series) integrated services router, front-to-back (FD) airflow
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ACS-4320-RM-19
Cisco ACS-4320-RM-19 — 19-inch rack mount kit for Cisco ISR 4320 Series routers; physical accessory, not a module or license
-
ACS-4330-FanASSY
Cisco ISR 4330 Fan Assembly Spare — replacement cooling fan tray for Cisco ISR 4331 Integrated Services Router, field-replaceable unit (FRU)
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ACS-4330-RM-19
Cisco 19-inch Rackmount Kit for ISR 4330/4430 Series Integrated Services Routers — 2-bracket mounting accessory, standard EIA 19-inch rack form factor
Verification sources (8)
- https://www.renewtech.com/cisco-isr4331-k9.html
- https://www.router-switch.com/pdf2html/pdf/isr4331-k9-datasheet.pdf
- https://www.techbuyer.com/us/cisco-isr4331-k9-isr-4331-rack-mountable-router-isr4331-k9-822234
- https://www.cisco.com/c/en/us/products/collateral/routers/4000-series-integrated-services-routers-isr/data_sheet-c78-732542.html
- https://serviceexpress.com/eol-eosl-database/products/cisco-isr4331-k9-cisco-network-services/
- https://www.layer23-switch.com/eol-eosl-tool/isr4331-k9/
- https://networkdevicesinc.com/products/isr4331-k9
- https://itprice.com/cisco/isr4331/k9.html
Need pricing on ISR4331/K9?
Send us the SKU. We come back with stock, lead time and price — typically within the same business day.