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.
Building a Complete AV System?
This product is rarely deployed alone. It’s typically part of a fully integrated AV system. AVENDOR designs, integrates, and supports end-to-end environments—from single rooms to enterprise-wide deployments.
- System Design & Engineering
- Installation & Integration
- Programming & Ongoing Support
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