Cisco GLC-FE-100FX= 100Base-FX SFP Module | Fast Ethernet, LC Duplex — GLC-FE-100FX=

Maintain dependable Fast Ethernet connectivity across multimode fiber with the Cisco GLC-FE-100FX= SFP transceiver. Built for FE ports, it provides 100Base-FX operation in a compact, hot-swappable form factor that fits cleanly into existing Cisco infrastructure. The LC duplex interface supports straightforward fiber patching, while the multimode design aligns with established campus and access-layer deployments. This module is a practical choice when you need to preserve service on installed fiber runs without replacing the surrounding switch fabric. It is well suited to environments where uptime, compatibility, and predictable optics matter more than chasing higher speeds. For teams managing mixed-generation networks, the GLC-FE-100FX= helps extend the life of proven hardware and keeps Fast Ethernet segments connected with minimal disruption. Cisco’s transceiver design also simplifies field replacement. Because it is hot-swappable, maintenance windows stay shorter and port-level changes are easier to execute. That makes it a strong fit for organizations that value controlled upgrades, consistent interoperability, and a lower-risk path for sustaining legacy fiber links. Ideal For Extend Fast Ethernet uplinks across multimode fiber in campus networks Replace failed optics in Cisco FE ports without reworking the link design Maintain legacy access-layer connectivity in mixed-generation environments Support short-distance fiber runs where 100Base-FX remains sufficient Why This Product 1 Built for Fast Ethernet rather than gigabit uplinks 2 Uses multimode fiber for legacy FE deployments 3 Hot-swappable design simplifies field replacement 4 LC duplex interface supports standard fiber patching