MFR. Name: Cisco | MFR#: GLC-FE-100BX-D=
100BASE-BX10-D SFP module for 100-Mb ports, 1550 nm TX3 /1310 nm RX4 wavelength, 10 km over single-strand SMF (Spare)
The Cisco 100BASE-BX10 SFPs operate on ordinary SMF single-strand link spans up to 10 kilometers long. The Cisco 100BASE-X 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.