Cisco 72-Port FXS Double-Wide Service Module

The Cisco 72-Port FXS Double-Wide Service Module is a high-density, plug-in solution engineered for demanding data networking environments where scalable voice signaling and rapid data transfer are essential. This 72-port FXS module is designed to deliver reliable performance across large campuses, data centers, and service-provider deployments, offering a compact double-wide form factor that maximizes port density without compromising manageability. With 72 RJ-21 LAN interfaces, it enables efficient aggregation of voice signaling and data paths, helping network operators consolidate infrastructure while maintaining high levels of service quality. The module’s twinaxial compatibility and streamlined plug-in design simplify deployment in Cisco-compatible chassis, reducing total cost of ownership and providing a straightforward upgrade path as network needs evolve. Whether you’re expanding your carrier-grade voice capabilities or boosting signaling capacity for complex communications environments, this module is built to deliver consistent throughput, dependable operation, and scalable growth in a single, integrated package.

• High-Density FXS Port Deployment: This module delivers 72 RJ-21 LAN ports in a single, compact double-wide form factor, enabling expansive voice and signaling capacity within a single plug-in module. Its dense port arrangement supports large-scale deployments such as call centers, enterprise campuses, and multi-tenant facilities, reducing cabinet clutter while maintaining clear, organized cabling. Designed for reliability in data networking environments, the module helps administrators optimize space utilization and simplify port management.
• Twinaxial Cable Support for Distances Up to 10 Meters: The device supports twinaxial cabling to extend reach between network elements up to 10 meters, enabling flexible topologies with minimal latency and interference. This capability is ideal for data-center and distribution-layer applications where short-run, high-speed connections are preferred, offering robust signal integrity and reduced need for intermediate repeaters or media converters.
• Plug-In Module for Seamless Cisco Integration: Engineered as a plug-in module, it plugs directly into compatible Cisco chassis, delivering plug-and-play deployment and straightforward management alongside other Cisco data networking components. The double-wide design aligns with standard Cisco backplane configurations, promoting consistent thermal and electrical behavior within the chassis and ensuring reliable integration with existing network architectures.
• Optimized for Data Networking Performance: Built for performance and uptime, the 72-Port FXS module supports scalable signaling and voice-related data flows across large networks. Its design emphasizes stable throughput, predictable latency, and resiliency, helping administrators maintain quality of service for signaling and data traffic without compromising network efficiency or manageability.
• 1-Pack Ready Packaging and Easy Maintenance: The module arrives as a 1-pack unit, packaged for straightforward installation and inventory management. Its durable build and Cisco-validated design support routine maintenance, field upgrades, and long-term upgrades, providing a reliable foundation for ongoing network evolution and minimizing replacement downtime during expansions.

Technical Details of Cisco 72-Port FXS Double-Wide Service Module

• Product type: FXS Double-Wide Service Module
• Ports: 72 x RJ-21 LAN ports
• Cable type: Twinaxial supported
• Form factor: Plug-in module, Double-Wide
• Packaging: 1-pack
• Compatibility: Designed for Cisco data networking platforms that support FXS twinaxial plug-in modules

How to Install Cisco 72-Port FXS Double-Wide Service Module

• Prepare and verify: Confirm your Cisco chassis model supports a double-wide FXS plug-in module and that you have a suitable slot available. Power down the chassis if required by your maintenance policy, or verify hot-swap capabilities per your hardware documentation.
• Access the chassis: Open the chassis access panel or remove the appropriate blanking plate to expose the available slot for the service module.
• Align and insert: Align the module’s connectors with the chassis backplane and gently insert until it seats securely. Ensure the module is firmly seated and level to avoid connection issues.
• Secure and reassemble: If the chassis uses retention screws or latches, fasten them to secure the module. Replace any cover plates and restore the chassis to its normal operating state.
• Connect and configure: Connect the RJ-21 cabling for each FXS port as required by your network design. Power on (or confirm power) and monitor the module LEDs for normal operation. Use Cisco management tools to configure signaling settings, verify port status, and validate connectivity across the 72 ports.

Frequently asked questions

• Q: What is the Cisco 72-Port FXS Double-Wide Service Module? A: It is a high-density plug-in module designed for Cisco data networking environments, offering 72 FXS ports (RJ-21) for voice signaling and related data paths in a single, double-wide package.
• Q: What kind of cables does it use and how far can they reach? A: The module supports twinaxial cabling, enabling relatively short-distance connections up to 10 meters while preserving high-speed data transfer and signal integrity.
• Q: Is this module compatible with all Cisco chassis? A: It is designed for Cisco platforms that support FXS twinaxial plug-in modules and the corresponding backplane interface. Always verify chassis compatibility and slot availability in the product documentation or on Cisco’s compatibility lists.
• Q: Is the module hot-swappable? A: In chassis configurations that support hot-swapping for service modules, this module can be installed or replaced without powering down the entire system. Refer to your chassis guide to confirm hot-swap support and procedures.
• Q: What comes in the package and what do I need besides the module? A: The package contains a single 72-Port FXS Double-Wide Service Module. You will typically need compatible Cisco chassis, RJ-21 cabling, and network configuration software or interfaces to manage and monitor the ports effectively.
• Q: How do I configure the 72 ports for signaling and data? A: Use Cisco management tools to map each RJ-21 port to its intended signaling or data path, set QoS as required, apply any necessary signaling protocols, and verify end-to-end connectivity with test traffic to ensure performance aligns with your network design.
• Q: Where can I find compatibility and firmware updates? A: Check Cisco’s official product pages and your Cisco account portal for compatibility matrices, firmware updates, and latest documentation to ensure ongoing support and security updates for your installation.