Cisco 4th Gen Voice/Fax Network Interface Module NIM-4FXO

BRAND NEW. FACTORY SEALED. FULL CISCO WARRANTY INCLUDED. MANUFACTURED BY CISCO.
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Overview

The Cisco NIM-4FXO is a fourth-generation voice and fax Network Interface Module built for Cisco 4000 Series Integrated Services Routers. It provides four FXO ports to connect routers directly to the public switched telephone network or to PBX and key systems.

This module supports critical telephony signaling such as caller ID and battery reversal detection. It also enables specialized use cases, such as CAMA trunks for dedicated E-911 services in North America, making it a dependable choice for regulated and enterprise voice environments.

Key Features

• Four FXO ports for PSTN and PBX connectivity
• Supports caller ID and battery reversal detection
• Software configurable for global country standards
• Enables CAMA trunks for E-911 services in North America
• Hot-swappable installation without powering down the router
• Designed for Cisco 4000 Series Integrated Services Routers

Technical Specifications

Manufacturer: Cisco

Product Type: Network Interface Module

Model: NIM-4FXO

Ports: 4 x FXO

Applications: Voice and fax

Form Factor: Plug-in module

Hot-Swappable: Yes

Platform Support: Cisco 4451-X Series

Use Cases

The NIM-4FXO is ideal for enterprises that require direct PSTN access, PBX integration, or analog trunk connectivity. It is best for branch offices, contact centers, and emergency services environments where reliable FXO connections and regulatory compliance are essential.

Why Choose the NIM-4FXO

• Direct PSTN and PBX integration within the router
• Supports emergency calling and CAMA trunk requirements
• Flexible country-specific configuration
• Hot insertion without service interruption
• Genuine Cisco hardware with full warranty

FAQs

What is the Cisco NIM-4FXO used for?

It connects Cisco 4000 Series routers to the PSTN or PBX systems using FXO ports.

What devices connect to FXO ports?

FXO ports connect to analog telephone lines, PBX systems, and PSTN trunks.

Does this module support caller ID?

Yes. It supports caller ID and battery reversal detection.

Can the NIM-4FXO be installed without shutting down the router?

Yes. It is hot-swappable, and you can insert it while the router is running.

Is this module suitable for E-911 deployments?

Yes. It supports CAMA trunks for dedicated E-911 services in North America.