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Black rectangular Cisco NIM-4FXO= module with four FXO ports

Cisco Systems, Inc.

Cisco Systems, Inc. NIM-4FXO= 4-port FXO voice interface card

SKU CH-N95J-QJKJY MPN NIM-4FXO=

Adds four analogue FXO ports for PSTN connectivity to Cisco 4451-X routers

  • TypeWireless Module
  • ColorBlack
  • FeaturesCisco Fourth-Generation Voice & Fax Network Interface Module
  • Connects four analogue lines with four FXO ports
  • Adds voice and fax services to Cisco 4451-X routers
  • Fourth-generation Cisco module delivers Unified Communications support
  • Network Interface Module form factor fits compatible ISR slots
  • Black finish matches standard Cisco hardware aesthetics

Voice interface card for ISR 4451

The Cisco NIM-4FXO= is a fourth-generation network interface module that adds four analog FXO ports to a Cisco 4451-X Integrated Services Router. It is designed for businesses that need to connect traditional telephone lines or legacy PBX trunks directly to their unified communications platform.

Four FXO ports and analog headroom

Each of the four ports terminates a single analog loop-start trunk, providing direct connectivity for up to four simultaneous PSTN calls or fax sessions. The module scales to the router’s DSP resources, so capacity is limited by the host chassis rather than the card itself.

Router slot integration and cabling

The card installs in an available NIM slot on the 4451-X and requires no external power supply. It frees the router from separate analog gateways by bringing FXO termination inside the chassis, reducing rack space and simplifying dial-plan management.

Highlights

  • Connects four analogue lines with four FXO ports
  • Adds voice and fax services to Cisco 4451-X routers
  • Fourth-generation Cisco module delivers Unified Communications support
  • Network Interface Module form factor fits compatible ISR slots
  • Black finish matches standard Cisco hardware aesthetics

Specifications

BrandCisco Small Business
ModelNIM-4FXO=
TypeWireless Module
ColorBlack
FeaturesCisco Fourth-Generation Voice & Fax Network Interface Modules provide voice and Unified Communications services on the Cisco Integrated Services Router
Shipping weight1.81 kg
Package size297 × 177 × 113 mm

Questions about this item

Will the NIM-4FXO= work inside my Cisco 4451-X router?

Yes, the module is built for Cisco 4451-X Integrated Services Routers and occupies one NIM slot for four FXO analog ports.

How can I verify the card is operating correctly after installation?

The router will list the module in inventory, show four FXO ports up, and register them with call-control software for inbound and outbound calls.

Does the package include the voice interface card only, or are cables and licences supplied as well?

The box contains the NIM-4FXO= voice interface card; analogue line cords and any required Cisco Unified Communications licences are purchased separately.

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