Cisco 4000 Integrated Services Routers (ISR)- Refurbished, Used, New

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Cisco ISR 4000 Integrated Services Routers are branch and enterprise edge routers that run IOS XE. The family runs from the compact ISR 4221 to the ISR 4461, and each model takes Network Interface Modules (NIM) for WAN, voice and switch ports, with larger models adding Service Modules (SM-X). NetworkTigers sells ISR 4000 routers, modules, memory, PVDM4 voice DSPs and power supplies refurbished, used and new. Every unit is tested before it ships so it works when it arrives.

ISR 4000 models and parts

Model or part	Used for	Shop
ISR 4221	Small branch, compact desktop or rack router	ISR 4221
ISR 4321, ISR 4331	Small and mid-size branch	ISR 4321 \| ISR 4331
ISR 4351	Branch with more module slots, including SM-X	ISR 4351
ISR 4431, ISR 4451, ISR 4461	Large branch and enterprise edge	ISR 4431 \| ISR 4451 \| ISR 4461
NIM modules	T1/E1, serial, Ethernet, DSL, voice (FXS, FXO, BRI) and switch ports	NIM modules
SM-X modules	Higher-density switch and Ethernet service modules	SM-X modules
PVDM4	Voice DSP modules; supported form factors depend on the router model	PVDM4
Memory and power	DRAM, flash and power supplies for ISR 4000	Memory \| 4320 power \| 4430 power \| 4450 power
Related Cisco routers	Other Cisco branch and edge routers	ISR 1000 \| Catalyst 8300 \| ASR 1000 \| All Cisco routers

Which ISR 4000 do I need?

Size the router by the throughput your site needs with the services you will run turned on, such as encryption, firewall or voice, not by WAN bandwidth alone, and by the number of module slots you want to fill. Then list the interfaces: the WAN type (Ethernet, T1/E1, serial or DSL), any voice ports, and how many switch ports you want inside the router. Check that each NIM or SM-X module fits the slots on your model: the ISR 4221, 4321 and 4431 have no SM-X slots, and slot counts differ across the range. For voice, DSP resources come as motherboard PVDM4 modules or as NIM and SM-X based DSP modules, and support differs by model (the ISR 4461 does not take motherboard PVDM4 modules). Give us your router model, voice modules and the voice services you plan to run, and we will confirm the right DSP hardware. Check the listing for installed memory, modules and power supplies, and whether the router has one or two power supplies.

Frequently asked questions

Do NIM modules from an ISR 4000 work in a Catalyst 8200 or 8300?
Many NIM modules are supported in both families, but support varies by module. Give us the module part number and the router model and we will confirm before you order.

NetworkTigers has sold enterprise network equipment since 1996. Every router and part carries the NetworkTigers 365-day warranty. Need a quantity? Ask us for a quote.