Description
The Cisco NIM-2FXS/4FXOP is a versatile analog voice network interface module designed for Cisco 4000 Series Integrated Services Routers (ISRs). It combines two FXS ports and four FXO ports into a single module, enabling flexible integration of analog phones, fax machines, PBX systems, and PSTN connections within enterprise voice deployments.
Equipped with an onboard digital signal processor (DSP), this module supports a wide range of voice features without requiring an external DSP resource. It delivers reliable voice connectivity, echo cancellation, fax and modem support, and compatibility with major Cisco voice protocols. The NIM-2FXS/4FXOP supports online insertion and removal, helping minimize downtime while scaling or upgrading voice infrastructure.
Ideal for branch offices, legacy telephony integration, and hybrid voice environments, this Cisco voice module provides dependable analog voice services within modern IP-based networks.
| Specification | Details |
|---|---|
| Brand | Cisco |
| SKU | NIM-2FXS/4FXOP= |
| Product Type | Voice Network Interface Module |
| Total Ports | 6 Ports |
| FXS Ports | 2 × FXS (FXS-E and DID capable) |
| FXO Ports | 4 × FXO |
| Supported Router Series | Cisco 4000 Series ISRs |
| DSP | Integrated onboard DSP |
| Voice Codecs | G.711, G.729a, G.726, G.723 |
| Fax Support | T.38 fax relay, fax pass-through |
| Modem Support | Modem detection and pass-through |
| Echo Cancellation | Supported |
| Caller ID | Supported (FXS/FXO modes) |
| Signaling Protocols | SIP, H.323, SCCP, MGCP |
| Installation | Hot-swappable (OIR supported) |
| Form Factor | Network Interface Module (NIM) |
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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
- Long-term service level agreements
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