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by Cisco
Product Line: Cisco Series
Product Type: Network Interface Module
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Original price $0.00 - Original price $0.00
Original price
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Product Description

The NIM-4FXSP module features four ports supporting FXS, FXS-E, and DID port types, compatible with Cisco IOS Release XE16.5 and above and designed for use in the Cisco 4400 and 4300 ISR series. It adheres to multiple international standards, including TIA-968-B (USA) and CS-03 (Canada), and incorporates advanced voice services such as echo cancellation, comfort noise generation, and DTMF detection. The module also supports essential features for high-quality voice communications, including modem detection and pass-through, RFC 4733 digit relay, and acoustic shock protection, weighing 0.44 lbs.

FAQs for the NIM-4FXSP

  • What are the total number of ports available?
    There are 4 ports available.
  • Which Cisco IOS Release is required for compatibility?
    Cisco IOS Release XE16.5 and above is required.
  • Can the hardware be used with Cisco 4400 and 4300 ISR Series?
    Yes, it is supported on Cisco 4400 and 4300 ISR Series.
  • What standards does the hardware comply with?
    It complies with TIA-968-B (USA), CS-03 (Canada), AS/CA S003 (Australia), and PTC220 (New Zealand).
  • What type of ports does the device have?
    The device has FXS, FXS-E, and DID port types.
  • Is echo cancellation supported?
    Yes, echo cancellation is supported.
  • What is the weight of the device?
    The device weighs 0.44 lbs.
  • Does it support voice activity detection?
    Yes, voice activity detection is supported.
  • Are comfort noise generation and DTMF detection features included?
    Yes, both comfort noise generation and DTMF detection features are included.
  • What type of cable is required for connection?
    A straight-through 2-wire cable is required for connection.

Product Review

The Cisco NIM-4FXSP module offers versatility with its support for FXS, FXS-E, and DID port types, making it suitable for connecting phones, fax machines, and key systems directly. However, its compatibility is limited to Cisco 4400 and 4300 series ISR routers and requires Cisco IOS XE16.5 or above, which may not fit all existing network infrastructures. Notably, it includes advanced features such as echo cancellation, voice activity detection, and support for multiple voice applications, enhancing voice communication quality and flexibility in network design.


The Cisco NIM-4FXSP is a versatile network interface module designed to enhance the capabilities of Cisco Integrated Services Routers (ISR), specifically within the 4400 and 4300 series. This module is engineered to support a wide range of voice applications, providing a seamless integration for voice over IP (VoIP) services. It features four ports, each capable of functioning as Foreign Exchange Station (FXS), FXS-E, or Direct Inward Dialing (DID), offering flexibility in deployment for various telecommunication requirements. Key specifications of the NIM-4FXSP include its adherence to several critical standards, ensuring its compatibility and reliability across different regions. It complies with TIA-968-B for the USA, CS-03 for Canada, AS/CA S003 for Australia, and PTC220 for New Zealand. In terms of immunity, it meets requirements set by CISPR24: 2010, EN 300 386 V1.6.1, EN55024: 2010, KN24: 2011, and TCVN 7317: 2003, demonstrating its resilience against environmental and electrical disturbances. Weighing just 0.44 lbs, the module is lightweight yet capable of delivering high-quality voice services. It incorporates advanced voice processing features such as echo cancellation, comfort noise generation, Dual-tone Multi-frequency (DTMF) detection, voice activity detection, and modem detection with pass-through capabilities. These functionalities ensure clear, uninterrupted communication, enhancing user experience. Additionally, the NIM-4FXSP supports RFC 4733 digit relay for efficient signal processing and offers acoustic shock protection to safeguard users against sudden loud noises. Its FXS features are tailored to support both FXS and DID functionality, with configurable long loop ports and a message waiting indicator for enhanced operational flexibility. Cable detection and straight-through 2-wire cable type compatibility further simplify installation and maintenance processes.
  • Total Number of Ports: 4
  • Port Type: FXS, FXS-E, and DID
  • Cisco IOS Release: XE16.5 and Above
  • The module's support for SNMP traps in response to alarms enables efficient network management and monitoring, ensuring administrators can quickly address and resolve issues. Despite its analog nature, the NIM-4FXSP does not require jumpers, simplifying the setup process. It also boasts Online Insertion and Removal (OIR) support, allowing for easy upgrades and maintenance without significant disruptions to network operations. Compatibility with multiple voice applications and real-time control and transport protocols underscores the module’s versatility, making it an ideal choice for businesses looking to leverage their existing Cisco ISR infrastructure for voice communication. However, it's important to note that the module does not support Cisco 2900 and 3900 series ISRs, focusing instead on the newer 4400 and 4300 series. In summary, the Cisco NIM-4FXSP network interface module offers a comprehensive solution for integrating voice services into Cisco's ISR 4400 and 4300 series routers. Its adherence to international standards, combined with a suite of advanced voice processing features, makes it a valuable addition to any network requiring reliable, high-quality voice communication capabilities.


    Item Number NIM-4FXSP
    Manufacturer Cisco
    Port Quantity 4
    Port Categories FXS, FXS-E, DID
    Minimum IOS Version Requirement XE16.5 or newer
    Compatible ISR Models 4400 and 4300 Series
    Compliance Standards TIA-968-B (USA), CS-03 (Canada), AS/CA S003 (Australia), PTC220 (New Zealand)
    Immunity Standards Compliance CISPR24: 2010, EN 300 386 V1.6.1, EN55024: 2010, KN24: 2011, TCVN 7317: 2003
    Mass 0.44 pounds
    Support for Echo Reduction Supported
    Generation of Comfort Noise Supported
    Capability to Detect DTMF Supported
    Voice Activity Identification Supported
    Modem Recognition and Compatibility Supported
    Support for RFC 4733 Digit Signals Supported
    Hearing Protection Against Sudden Noises Supported
    FXS Detailed Capabilities Supports FXS/DID modes, Port Configuration for Extended Loops, Notification for Messages Waiting, Detection of Connected Cables
    Function of DID Ports Connection to External DID from Main Office
    FXS Port Usage Direct Link to Telephones, Facsimile Devices, and PBX Systems
    Recommended Cable Specification 2-Wire, Straight-Through
    SNMP Alarm Notifications Enabled
    Type Analog
    Presence of Jumpers None
    Support for Cisco 2900/3900 Series Not Supported
    Hot Swappable Supported
    Compatibility with Multiple Voice Applications Supported
    Real-Time Protocols Compliance Supported

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