4GL Fourth-Generation Language_
FACCH Fast Associated Control Channel
FASB Financial Accounting Standards Board
FASC Fraud Analysis and Surveillance Center (AT&T)
FASTAR Fast Automatic Restoral (AT&T)
FAT File Allocation Table
FC Frame Control
FC Fibre Channel
FC-0 Fibre Channel—Layer 0
FC-1 Fibre Channel—Layer 1
FC-2 Fibre Channel—Layer 2
FC-3 Fiber Channel–Layer 3
FC-4 Fibre Channel–Layer 4
FC-AL Fibre Channel-Arbitrated Loop
FCC Federal Communications Commission
FCS Frame Check Sequence
FDDI Fiber Distributed Data Interface
FDIC Federal Deposit Insurance Corporation
FDL Facilities Data Link
FEC Forward Error Correction
FECN Forward Explicit Congestion Notification
FEP Front-End Processor
FHSS Frequency Hopping Spread Spectrum
FIB Forward Indicator Bit
FIB Forwarding Information Base
FIFO First-In/First-Out
FIRST Flexible Integrated Radio Systems Technology
FITL Fiber-In-The-Loop
FM Frequency Modulation
FOCC Forward Control Channel
FOD Fax on Demand
FPF Fraud Protection Feature
FRAD Frame Relay Access Device
FRF Frame Relay Forum
FRS Family Radio Service
FS Frame Status
FSN Forward Sequence Number
FTAM File Transfer, Access, and Management
FT1 Fractional T1
FTP File Transfer Protocol
FTS Federal Telecommunications System
FTTB Fiber To The Building
FTTC Fiber To The Curb
FTTH Fiber To The Home
FWA Fixed Wireless Access
FWT Fixed Wireless Terminal
FX Foreign Exchange (line)
FXO Foreign Exchange Office
FXS Foreign Exchange Station
