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Products Portable Radios Mobile Radios Repeaters BroadbandAccessoriesAccessories Service Contacts Resources |
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Wireless Networking Glossary
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F
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FAQ
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Frequently Asked Questions
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Fast Fading
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Fade duration short relative to channel frame length
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FBI
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US Federal Bureau of Investigation
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FCC
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US Federal Communications Commission
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FDD
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Frequency Division Duplex
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FDDI
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In computer networking, fiber-distributed data interface (FDDI) is a standard for data transmission in a local area network that can extend in range up to 200 km (124 miles)
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FDM
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Frequency Division Multiplexing. Means of combining multiple data streams on a single carrier by modulating carriers of differing frequencies with various baseband data streams.
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FDMA
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Frequency Division Multiple Access.
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FDN
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Fixed Dialing Number
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FEC
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Forward Error Correction
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FHMA
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Frequency Hopping Multiple Access
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FHSS
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Frequency Hopping Spread Spectrum.
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Fiber Optics
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Medium and technology associated with transmission of information as light impulses along glass or plastic wire or fiber.
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FIFO
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First in, first out. A queuing methodology similar to lining up for a bank teller. Compare with LIFO
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FIPS
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US Federal Information Processing Standards
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Firewall
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Set of related programs, located at network gateway server, that protects resources of private network from users from other networks.
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Fixed wireless
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Operation of wireless devices or systems in fixed locations. High speed point-to-point wireless connections. Vs mobile wireless connections. A.k.a. "fiber in the air", a complement to fiber optic cable connections. See Mobile Wireless, IR Wireless, Portable Wireless, and Wireless.
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FM
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Frequency Modulation
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FQDN
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Fully Qualified DN. A domain name with enough information (including server name, if necessary, to determine a unique IP address). For example, if 'domain.com' had two servers, 'alpha' and 'beta', 'alpha.domain.com' would be fully-qualified, but 'domain.com' would not.
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FRAD
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Frame Relay Access Device
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Frame Relay
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Frame relay is an efficient data transmission technique used to send digital information quickly and cheaply to one or many destinations from one point. It can be used for voice, data, local area network (LAN), and wide area network (WAN) traffic. Each frame relay end user gets a private line to a frame relay node
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Frequency
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For oscillating or varying current, the number of complete cycles per second in alternating current direction. Standard unit of frequency is hertz, or Hz. See Band.
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FRU
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Field-Replaceable Units. Part that can be quickly and easily removed and replaced by user or by technician.
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FSK
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Frequency Shift Keying
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FSO
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Free-space optics. Unregulated spectrum, Strong data security. Also known as free-space photonics (FSP), referring to transmission of modulated visible or IR beams through atmosphere to obtain broadband communications. Most frequently, laser beams are used, although non-lasing sources such as LEDs or IR-emitting diodes (IREDs) will serve the purpose.
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FTAM
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File Transfer, Access and Management
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FTI
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Fractional T1. A customer may lease a portion of a full T1
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FTP
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File Transfer Protocol. Standard Internet protocol, simplest way to exchange files between computers on Internet.
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FTTB
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Fiber to the Building. Refers to installing optical fiber from telephone company central office to a specific building, such as a business or apartment house.
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FTTC
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Fiber to the Curb. Installation and use of optical fiber cable directly to the curbs near homes or any business environment as a replacement for POTS.
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FTTH
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Fiber to the home
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FTTN
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Fiber to the Neighborhood. Installation and use of optical fiber cable to all curbs or buildings in a neighborhood.
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FTTP
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Fiber to the Premises.
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Full Duplex
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Transceiver mode designed to allow reception of signals during transmission periods. Requires transmitter and receiver to operate on substantially different frequencies to prevent signal interference. Cellular and cordless telephone sets use this mode. See Transceiver.
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FWA
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Fixed Wireless Access.
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