Cisco NIM-2FXSP 2-port Network Interface Module for ISR 4000 Series Routers NIM2FXSP

Description:

The Cisco NIM-2FXSP Network Interface Module is used in Cisco ISR 4000 Series routers to provide two Foreign Exchange Station (FXS) analog voice ports for integration with traditional telephony devices. This module enables compatible routers to connect analog endpoints such as telephones, fax machines, and analog PBX systems to IP-based voice networks, supporting unified communications deployments. Installed in a Network Interface Module slot, it allows the router to function as a voice gateway that bridges analog voice equipment with VoIP infrastructure. The module supports reliable analog voice connectivity while integrating with Cisco IOS voice services for call routing and management. Its compact modular design allows organizations to expand router voice capabilities without requiring separate voice gateway hardware. Telecom engineers, network administrators, and system integrators commonly deploy this module for analog device connectivity, voice gateway installations, telephony system upgrades, and replacement of existing analog voice interface modules.

Applications:

The Cisco NIM-2FXSP module is widely used in enterprise and branch office environments where analog telephony devices must connect to IP-based voice networks. It is commonly installed in Cisco ISR 4000 Series routers to support analog phones, fax machines, and legacy telephony equipment within unified communications systems. Organizations deploy this module in corporate offices, call centers, healthcare facilities, retail locations, and government networks where existing analog voice infrastructure must operate alongside modern VoIP platforms.

Technical Specifications:

• Brand: Cisco
• Part Number: NIM-2FXSP
• Model Number: NIM2FXSP
• Product Type: Network Interface Module (Analog Voice Interface)
• Interface Ports: 2 × FXS analog voice ports
• Interface Type: Foreign Exchange Station (FXS)
• Connector Type: RJ-11
• Compatibility: Cisco ISR 4000 Series Integrated Services Routers
• Voice Support: Analog telephony devices and VoIP gateway functionality
• Installation Type: Network Interface Module slot installation
• Management: Cisco IOS voice configuration and control
• Form Factor: Compact internal router module
• Deployment Environment: Enterprise voice gateways and unified communications networks

Common Replacements:

• Cisco NIM-4FXSP Network Interface Module
• Cisco NIM-2FXO Voice Interface Module
• Cisco VIC2-2FXS Voice Interface Card