REFURBISHED
Cisco
Cisco SM-X-NIM-ADPTR Refurbished NIM Adapter for ISR 4300/4400
MPN: SM-X-NIM-ADPTR
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Lifetime
Warranty
ISO 9001
Certified Testing
R2v3
Responsible Refurb
25+
Years
5K+
Customers
ISO
Certified
✓
Tested
Every WhaleyComm unit is professionally tested, reset to factory defaults, and certified by our in-house engineers — the same standard trusted by 5,000+ organisations across 25 years. Not a refurb marketplace. A certified lifecycle partner.
Professionally tested and reset to factory defaults. Backed by 25 years of enterprise trust.
This refurbished Cisco SM-X-NIM-ADPTR is a Network Interface Module adapter designed for the SM-X slot on Cisco 4300 and 4400 Series Integrated Services Routers (ISRs). Professionally tested and reset to factory defaults, this unit gives organizations a cost-effective path to expanding their ISR platform without compromising on Cisco quality or compatibility.The SM-X-NIM-ADPTR functions as a carrier card, converting the SM-X slot on a Cisco 4000 Series ISR into a NIM slot capable of accepting one single-wide or double-wide network interface module. This unlocks support for a broad range of NIM types including T1/E1 voice and data, FXO/FXS, switching, serial, storage drives, mobility (3G/4G), and G.HDSL — making it one of the most versatile expansion adapters in the Cisco ISR 4000 ecosystem.
WhaleyComm has served 5,000+ enterprise customers for 25+ years, sourcing, testing, and certifying refurbished Cisco hardware under ISO 9001, R2v3, and e-Stewards standards. At $49, this unit delivers proven Cisco functionality at a fraction of the new replacement cost, making it ideal for branch refreshes, lab builds, or adding WAN capability to existing ISR deployments.
Technical Specifications
Part Number
SM-X-NIM-ADPTR
Product Type
Network Interface Module Adapter
Slot Type
SM-X (Service Module)
Function
Converts SM-X slot to NIM slot for use with single-wide or double-wide NIMs
NIM Form Factor Support
Single-wide and double-wide
Compatible Platforms
Cisco ISR 4300 Series, Cisco ISR 4400 Series
LED Indicator
Yes
Installation Type
Internal module (hot-swap not supported during installation)
Ideal Use Cases
Branch WAN Expansion
Deploy the SM-X-NIM-ADPTR in a Cisco 4300 or 4400 Series ISR to add T1/E1 or serial WAN interfaces at a branch site, maximizing existing router investment without chassis replacement.
Voice and PSTN Connectivity
Use the adapter to seat FXO or FXS NIMs in the SM-X slot, enabling PSTN trunking or analog extension connectivity for branch unified communications deployments.
Mobility and 4G LTE Backhaul
Install a 3G/4G NIM via the adapter to add cellular WAN failover or primary connectivity to Cisco ISR 4000 Series routers, supporting resilient branch architectures.
Storage Module Integration
Use the adapter to host storage drive NIMs inside the ISR chassis, enabling local logging, caching, or media storage without adding external devices.
Lab and Test Environment Build-Out
Add NIM-based interfaces to existing ISR 4000 lab routers at low cost, enabling realistic WAN simulation and protocol testing across a wide range of interface types.
Refreshing Existing ISR 4000 Deployments
Extend the useful life of deployed Cisco 4300 and 4400 Series routers by unlocking NIM slot capability in the SM-X bay, avoiding costly forklift upgrades.
What's Included
1x Cisco SM-X-NIM-ADPTR Network Interface Module Adapter
Lifetime Warranty
Certificate of Testing
Lifetime Warranty — No Time Limits. No Questions.
Every WhaleyComm unit ships with a Lifetime Warranty. If it fails under normal operating conditions at any point, we replace it. We have stood behind our hardware for 25 years and 5,000+ customers — that is not a marketing line, it is our operating standard.
Compatibility Details
Review supported optics, cables, software, management protocols, and environment-specific compatibility guidance.
The Cisco SM-X-NIM-ADPTR is compatible with the following Cisco 4000 Series Integrated Services Routers
✓
Cisco ISR 4321
✓
Cisco ISR 4331
✓
Cisco ISR 4351
✓
Cisco ISR 4431
✓
Cisco ISR 4451-X
The adapter supports the following NIM types when seated in the SM-X slot
✓
T1/E1 (Voice and Data)
FXO/FXS
✓
Switching
✓
Serial
✓
Storage Drives
✓
Mobility (3G/4G)
G.HDSL
For compatibility verification specific to your environment, contact our engineering team: +1 214 607-4800 or sales@whaleycomm.com
Shipping & Returns
Clear fulfilment, tracking, return, warranty, and support information for enterprise hardware orders.
Shipping
Orders typically ship within 1-2 business days after payment confirmation. Tracking details are shared once the order has been dispatched.
Returns
Eligible products can be returned according to WhaleyComm's return policy. For DOA, warranty, or product-related issues, contact the support team for replacement or resolution.
Frequently Asked Questions
Product-specific answers about compatibility, testing, warranty, fulfilment, and purchase confidence.
The SM-X-NIM-ADPTR is designed for the Cisco 4300 and 4400 Series Integrated Services Routers, including the ISR 4321, 4331, 4351, 4431, and 4451-X, as confirmed in Cisco's official hardware documentation. It installs into the SM-X slot on these platforms and converts it to a NIM-compatible slot.
According to Cisco's official installation documentation, the SM-X-NIM-ADPTR supports NIMs including T1/E1 (Voice/Data), FXO/FXS, Switching, Serial, Storage Drives, Mobility (3G/4G), and G.HDSL. Both single-wide and double-wide NIMs are supported.
The SM-X-NIM-ADPTR itself is a passive carrier card and does not independently require a specific IOS version, but the NIM modules used with it may have minimum Cisco IOS XE software requirements. Consult the datasheet for your specific NIM for software prerequisites.
Yes. Every WhaleyComm unit ships with a Lifetime Warranty. If it fails under normal operating conditions at any point, we replace it at no cost — no time limits, no questions asked.
Every unit goes through our ISO 9001-certified testing process: full power-on diagnostics, port-by-port functionality testing, firmware verification, factory reset, and final inspection. A Certificate of Testing ships with every unit.
Cisco SM-X-NIM-ADPTR Refurbished NIM Adapter for ISR 4300/4400
$49.00
Cisco
Cisco SM-X-NIM-ADPTR Refurbished NIM Adapter for ISR 4300/4400
MPN: SM-X-NIM-ADPTR
$49.00
In Stock — Ships Same Day
