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

BRAND NEW. FACTORY SEALED. FULL CISCO WARRANTY INCLUDED. MANUFACTURED BY CISCO. FROM CHICAGO COMPUTER SUPPLY

Overview

The Cisco NIM-4FXS is a fourth-generation voice and fax Network Interface Module designed for Cisco 4000 Series Integrated Services Routers. It provides four FXS ports that allow direct connection of analog phones, fax machines, and key systems to a modern IP-based router.

This module enables reliable voice services while simplifying branch voice deployments. It supports essential telephony features such as caller ID and battery polarity reversal, making it suitable for controlled enterprise environments where integrated voice remains critical.

Key Features

• Four FXS ports for analog voice and fax devices
• Direct connection for phones, fax machines, and key systems
• Generates caller ID and battery polarity reversal
• Hot-swappable installation without powering down the router
• Designed for Cisco 4000 Series Integrated Services Routers
• Off-Premises Extension Lite functionality

Technical Specifications

Manufacturer: Cisco

Product Type: Network Interface Module

Model: NIM-4FXS

Ports: 4 x FXS

Applications: Voice and fax

Form Factor: Plug-in module

Hot-Swappable: Yes

Platform Support: Cisco 4451-X Series

Use Cases

The NIM-4FXS is ideal for branch offices and enterprise sites that still rely on analog phones or fax machines. It supports voice integration with Cisco 4000 Series routers, enabling organizations to maintain essential telephony services while modernizing their network infrastructure.

Why Choose the NIM-4FXS

• Integrates analog voice directly into the router
• Reduces the need for separate voice gateways
• Supports essential telephony signaling features
• Enables hot insertion without service interruption
• Genuine Cisco hardware with full warranty

FAQs

What is the Cisco NIM-4FXS used for?

It connects analog phones and fax machines directly to Cisco 4000 Series routers using FXS ports.

What devices can connect to the FXS ports?

Analog telephones, fax machines, and key systems can connect directly.

Does this module support caller ID?

Yes. It supports caller ID and battery polarity reversal.

Can the NIM-4FXS be installed without powering off the router?

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

Is this module suitable for full off-premises extensions?

No. It is classified as an Off-Premises Extension Lite module and is not fully compliant for all off-premises use cases.