10BASE-FB

A 10-Mbps baseband Ethernet specification that uses fiber-optic cabling. 10BASE-FB is part of the IEEE 10BASE-F specification. It is not used to connect user stations, but instead provides a synchronous signaling backbone that allows additional segments and repeaters to be connected to the network. 10BASE-FB segments can be up to 2000 meters long. See also 10BASE-F and Ethernet.