A 100M fiber optic transceiver is a hot-pluggable network component that converts electrical signals into optical signals and vice versa, enabling data transmission over fiber optic cables at Fast Ethernet speeds (100Mbps). In the vast ecosystem of network infrastructure, the humble 100M optical transceiver (or 100M SFP module) remains a critical workhorse for enterprise access layers, industrial networks, and legacy system upgrades. Choosing the right one, however, can be a complex puzzle of compatibility, fiber. The FS® 100BASE Small Form-Factor Pluggable (SFP) device (Figure 1) is a hot-swappable input/output device that plugs into Fast Ethernet ports, dual-rate Fast/Gigabit Ethernet ports, or Gigabit Ethernet ports of a FS switch or router, linking the port with the fiber cabling network. The 100FX transceivers enabled by Aruba Switches use an SGMII (Serial Gigabit MII) interface with 8B/10B encoding. The specifications for Revision D. GIGALIGHT's 100M SFP series optical transceiver modules are extensively used in Fast Ethernet (100M Ethernet) and are compatible with Synchronous Optical Networks (SONET OC-3 / SDH STM-1), offering a maximum transmission distance ranging from 2km to 150km.