MFR. Name: Cisco | MFR#: GLC-FE-100FX-RGD=
Fast Ethernet SFP, LC connector, FX (100Mb/s multimode) transceiver
The Cisco 100BASE-FX Small Form-factor Pluggable (SFP) is a hot-swappable input/output device that plugs into a Fast Ethernet port or slot, linking the port with the network.
