Cisco 1-Port 100Base-FX SFP Module – 2 km MMF, Hot-Swap SFP for Fast Ethernet

The Cisco 1-Port 100Base-FX SFP Module is a purpose-built, hot-swappable transceiver designed to extend Fast Ethernet connectivity over optical fiber. Engineered for reliability and seamless integration with Cisco switches and routers, this SFP module connects a Fast Ethernet port to a fiber network, delivering stable performance, low latency, and resilient operation in demanding enterprise environments. It is particularly well-suited for campus networks, branch offices, and data centers where fiber-based uplinks are preferred for security, noise immunity, and distance requirements. The 100Base-FX SFP module leverages standard multimode fiber to enable link spans up to 2 kilometers, offering a cost-effective upgrade path from copper while preserving the ease of management associated with Cisco devices. With Cisco quality ID and confirmed interoperability with Cisco IOS, Catalyst, and other Cisco platforms, this module provides a dependable, scalable solution that reduces downtime and simplifies network design. Its compact form factor and hot-swappable design minimize maintenance disruption, making it a practical choice for network engineers who value plug-and-play capability, plug-in reliability, and long-term network performance.

• Compact, hot-swappable SFP transceiver that plugs into a Cisco Fast Ethernet port or slot, enabling a fiber-based uplink without the need for extensive reconfiguration. Its design prioritizes ease of installation, quick swaps in field conditions, and minimal impact on existing networks—keeping downtime to a minimum and ensuring continuous connectivity for business-critical applications.
• Delivers 100 Mbps Fast Ethernet over multimode fiber, providing a stable, low-latency link ideal for office VLANs, access layer connections, and inter-building connectivity. The 1310 nm wavelength supports reliable transmission over typical MMF installations, helping preserve data integrity across longer distances while staying compatible with widely deployed Cisco devices.
• Supports multimode fiber link spans up to 2 kilometers, enabling flexible network layouts that connect campuses, building-to-building links, or remote office sites without resorting to copper-based solutions. This extended reach makes it a practical option for organizations seeking to consolidate infrastructure and simplify management while maintaining high-speed Ethernet access where needed.
• LC duplex fiber connector ensures a compact, robust, and industry-standard interface for fiber cabling. The LC connector is known for its secure latch mechanism, low insertion loss, and ease of termination, helping administrators achieve clean fiber runs and reliable performance in patch panels, media converters, and switch ports.
• Cisco quality ID and broad interoperability with Cisco IOS and Catalyst platforms guarantee reliable operation within existing Cisco networks. The module is designed to work seamlessly with Cisco devices, reducing compatibility concerns and enabling administrators to expand network capacity with confidence.

Technical Details of Cisco 1-Port 100Base-FX SFP Module

• Product Type: SFP transceiver module for Fast Ethernet (100Base-FX)
• Port Interface: 1 x 100BASE-FX SFP port for connecting a fiber uplink to a switch or router
• Fiber Type: Multimode fiber (MMF) for standard campus or data-center deployments
• Wavelength: 1310 nm (typical for MMF 100Base-FX applications)
• Maximum Distance: Up to 2 kilometers on appropriate MMF cable
• Connector Type: LC duplex fiber connector for reliable optical termination
• Data Rate: 100 Mbps (Fast Ethernet) over MMF
• Hot-Swappable: Yes, designed for minimal downtime during installation or replacement
• Compatibility: Optimized for Cisco devices with Quality ID support, compatible with Cisco interfaces and management workflows

how to install Cisco 1-Port 100Base-FX SFP Module

Before installation, ensure you have the correct fiber patch cables with LC connectors rated for multimode fiber and the appropriate OM grade for your distance requirements. Power down the equipment only if your system policy requires it; many Cisco switches support hot-swapping, but it is always best to follow your organization’s change-management procedures. To install, gently insert the SFP module into the available SFP port or slot on the Cisco switch or router until it seats firmly, listening for a click or feeling the module engage with the connector. Verify that the LED indicators on the device reflect a healthy link after seating the module; this is typically indicated by a solid or blinking link LED on the corresponding port. Connect the fiber patch cable to the LC duplex connector on the SFP; route the cable to the remote device, ensuring minimum bend radius and avoiding tight twists that can impair signal integrity. At the remote end, connect to a compatible 100Base-FX device with an LC duplex interface, using another MMF patch cable of appropriate quality. Power up the device if you performed a power-down procedure, or simply observe the link status if hot-swapping. Once connected, configure the switch port as a 100 Mbps Fast Ethernet interface if necessary, and verify the connection using the management console, SNMP, or web interface. Monitor the link reliability, throughput, and error statistics to confirm stable operation. If the link does not establish, reseat the module, inspect the fiber for damage or contamination, check polarity, and confirm that both ends of the link use the same MMF specification and connector type. Keep a spare module and fiber accessories on hand to minimize downtime during maintenance windows. Regular inspection of fiber connectors for cleanliness and proper termination will further ensure long-term performance and reduce the need for troubleshooting.

Frequently asked questions

Q: What is the primary use case for the Cisco 1-Port 100Base-FX SFP Module?
A: It provides a reliable, fiber-based uplink for Fast Ethernet networks, enabling 100 Mbps connectivity over multimode fiber across distances up to 2 kilometers, which is ideal for campus networks, data centers, and branch offices that require optical network resilience and extended reach.

Q: Which fiber type and connector are used?
A: The module uses multimode fiber (MMF) with a duplex LC connector, a common and industry-standard pairing that supports straightforward installation and robust performance in indoor or campus environments.

Q: Is the module hot-swappable?
A: Yes. The SFP module is designed for hot-swappable operation, allowing installation or replacement without powering down the host device, in accordance with equipment policies and safe-handling practices.

Q: What about compatibility with Cisco devices?
A: The module is designed to work with Cisco devices and supports Cisco quality ID, ensuring reliable interoperability with Cisco switches and routers and aligning with Cisco management workflows and configurations.

Q: What performance can I expect?
A: The module delivers 100 Mbps Fast Ethernet over MMF, with link distances up to 2 kilometers depending on fiber quality and installation specifics. It provides dependable throughput for typical office or campus connectivity demanding moderate bandwidth uplinks and straightforward, cost-effective fiber deployments.