| Term | Description |
FACCH | FACCH - Fast Associated Control Channel; similar to the SDCCH but used in parallel for operation of the TCH. If the data rate of the SACCH is insufficient borrowing mode is used
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FB | FB - Frequency Correction Burst; used for frequency synchronisation of the mobile
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FCC | FCC - Federal Communications Commission; the US regulatory body for telecommunications
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FCCH | FCCH - Frequency Correction Channel; downlink only, correction of MS frequencies, transmission of frequency standard to MS etc.
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FDD | FDD - Frequency Division Duplex; a radio technique which uses paired spectrum; UMTS has an FDD element
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FDMA | FDMA - Frequency Division Multiple Access-a transmission technique where the assigned frequency band for a network is divided into sub-bands which are allocated to a subscriber for the duration of their calls
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FEC | FEC - Forward Error Correction
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FH | FH - Frequency Hopping
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FH-CDMA | FH-CDMA - Frequency Hopping CDMA
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FMC | FMC - Fixed Mobile Convergence
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FMI | FMI - Fixed Mobile Integration
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FPLMTS | FPLMTS - Future Public Land Mobile Telecommunications System, the original title of the ITU’s third generation concept now known as IMT-2000
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FRA | FRA - Fixed Radio Access; see WLL
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FSDPSK | FSDPSK - Filtered Symmetric Differential Phase Shift Keying
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FSK | FSK - Frequency Shift Keying; a method of using frequency modulation to send digital information
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FSOQ | FSOQ - Frequency Shift Offset Quadrature Modulation
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FSS | FSS - Fixed Satellite ServiceGb. The interface between the PCU and the SGSN in a GSM/GPRS network
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