Description
The Cisco NIM-4FXSP is a 4-port analog voice network interface module designed for Cisco 4000 Series Integrated Services Routers. This module provides flexible support for FXS, FXS-E, and Direct Inward Dial (DID) voice applications, enabling seamless integration of analog phones, fax machines, and PSTN connectivity into modern IP networks.
Built with an onboard digital signal processor (DSP), the NIM-4FXSP delivers reliable voice processing without requiring additional router DSP modules. It supports advanced voice features such as echo cancellation, caller ID, fax relay, and multiple industry-standard voice codecs, making it ideal for enterprise voice gateways, branch office telephony, and hybrid VoIP deployments.
With online insertion and removal (OIR) support, the Cisco NIM-4FXSP allows for simplified installation and maintenance while minimizing network downtime. Its compact design and compatibility with Cisco IOS XE software make it a dependable choice for organizations modernizing or expanding their voice infrastructure.
| Specification | Details |
|---|---|
| Brand | Cisco |
| Model | NIM-4FXSP |
| Product Type | Network Interface Module (NIM) |
| Ports | 4 x Analog FXS |
| Supported Functions | FXS, FXS-E, Direct Inward Dial (DID) |
| Voice DSP | Integrated onboard DSP |
| Supported Codecs | G.711, G.729a, G.726, G.723 |
| Fax Support | T.38 fax relay, fax pass-through |
| Echo Cancellation | Supported |
| Caller ID | Supported (FXS mode) |
| Router Compatibility | Cisco 4000 Series ISRs |
| Installation | Online insertion and removal (OIR) |
| Form Factor | Internal plug-in module |
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Return Policy (Short Summary)
We offer a 30-day return window for most unopened, factory-sealed items.
Returns must be authorized before shipping back and must include all original packaging and accessories. Opened or used items are not returnable unless defective.
Some products—such as custom orders, special-order items, audio gear, software, and LED video walls—are non-returnable. Non-defective returns may be subject to a 20–30% restocking fee, and customers are responsible for return shipping costs.
For damaged or incorrect items, please contact us immediately.
From Scope to Sign-Off
A structured delivery process designed to reduce risk and keep projects moving.
Plan
Discovery, site review, requirements gathering, and project alignment. We define scope, constraints, and success criteria before any design work begins.
- Discovery calls & stakeholder interviews
- On-site survey & infrastructure review
- Requirements & use-case documentation
- Project scope, timeline & milestone alignment
Engineer
System design, schematics, signal flow, BOM development, and documentation. Every project leaves this phase with a complete engineering package.
- AV system design & signal flow diagrams
- Equipment selection & BOM development
- Rack layout & control system design
- As-built documentation package
Deploy
Procurement, logistics, installation, programming, commissioning, and training. We own the delivery from first shipment to final handoff.
- Authorized procurement & logistics coordination
- Physical installation & cable management
- Control system programming & configuration
- Commissioning, testing & end-user training
Support
Monitoring, maintenance, lifecycle planning, and long-term service agreements. We stay engaged long after project close.
- 24/7 remote system monitoring
- Preventive & reactive maintenance
- Technology lifecycle & refresh planning
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