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Glossary of broadband terminology: F
- Far End CrossTalk
- Leakage of one or more foreign sources into the receiver of a system at the distant end of a transmission system.
- Fast Ethernet
- A LAN used to connect devices within a single building or campus at speeds up to 100 Mbps. Within the OSI model, Fast Ethernet is defined at layer one (physical) and layer two (data link). Like Ethernet, it uses CSMA/CD.
- Federal Communications Commission
- The US federal regulatory agency responsible for regulating interstate and international communications.
- Feeder
- That portion of the telephone cable plant that extends from the CO to distribution frames where distribution cables deliver traffic to subscribers.
- Feeder Distribution Interfaces
- Points where cable bundles from the telephone switch use drop lines extended out to service users.
- Fiber Distributed Data Interface
- A LAN token ring standard using fiber optic cable.
- Fiber Optic Cable
- A transmission medium composed of glass or plastic fibers; pulses of light are emitted from a laser-type source. Fiber optic cabling is the present cabling of choice for all interexchange networks,and increasingly for the local exchange loops as well; it is high security, high bandwidth, and takes little conduit space. Considered the physical medium of all future, land-based communications.
- Fiber To The Cabinet
- Network architecture where an optical fiber connects the telephone switch to a street-side cabinet where the signal is converted to feed the subscriber over a twisted copper pair.
- Fiber To The Curb
- A telephone company service delivery system that delivers voice and video programming to small clusters of residences using fiber optics as the feeder and either twisted pairs or coax cable as the distribution plant to each home.
- Fiber To The Home
- Network where an optical fiber runs from telephone switch to the subscriber's premises or home.
- File Transfer Protocol
- Internet tool for accessing files linked to the Internet.
- Frame Relay
- A high-speed, packet-switched data communications service,similar to X.25. Frame relay is a leading contender for LAN-to-LAN interconnect services, and is well suited to the bursty demands of LAN environments. See also Permanent Virtual Circuit and Switched Virtual Circuit.
- Frequency Division Multiplexing
- A multiplexing technique that uses different frequencies to combine multiple streams of data for transmission over a communications medium. FDM assigns a discrete carrier frequency to each data stream and then combines many modulated carrier frequencies for transmission.
- Full Duplex
- Refers to the transmission of data in two directions simultaneously.
