（单词翻译:单击）
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FAQ - An acronym1 for Frequently Asked Questions. FAQs are online documents that list and answer the most common questions on a particular subject.
Federal Excise2 Tax - A 3% tax mandated3 by the federal government imposed on all telecommunications services including local, long distance and wireless4 bills.
Federal Subscriber5 Line Charge - This is a charge paid by consumers implemented6 by the Federal Communications Commission (FCC). It is intended to recover some of the costs associated with a customer's local telephone line to access the interstate long distance network. It helps keep interstate long distance rates low. You pay this charge whether or not you actually make long distance calls.
FCC - Federal Communications Commission. A United States government board made up of five presidential appointees that has the authority to regulate interstate telecommunications, as well as international communications that originate or terminate in the U.S.
File Transfer Protocol7 (FTP) - A common method for sending and/or receiving files between Internet sites using a login system. Publicly accessed FTP sites are often called anonymous8 FTPs.
Firewall - A combination of hardware and software used to separate a LAN into two separate parts for security reasons.
Frequency - A certain "size" of radio wave: The rate at which the electric and magnetic fields of a radio wave vibrate per second.
FTTP (Fiber to the Premises9) - A fiber-optic network that connects directly from the carrier network to the user premises. Another fiber-optic network is FTTC (Fiber to the Curb10) that connects from the carrier network to the curb, and from there to the premises by copper11 wire or coaxial cable.
Facilities Based Private Switched Network Services
Facilities Based Private Switched Network Services is a private network for which LECs and IXCs dedicate physical switching and transmission facilities for the exclusive use of a particular customer.
Fast Packet
Fast Packet is a term referring to a number of broadband switching and networking paradigms12. Implicit13 is the assumption of an operating environment that includes reliable, digital, broadband, nearly error free transmission system.
FCC Federal Communications Commission
The FCC is a board of commissioners14 empowered by the U.S. Congress to regulate all interstate and international communications, as well as use of the radio frequency media.
FDDI
fiber-distributed data interface15
FDL
facility data link
FDM
frequency division multiplexing
FEP
front-end processor
FIPS
Federal Information Processing Standard
Foreign Exchange (FX)
FX is a service that provides a circuit(s) between a user station, a PBX, or a Centrex switch, and a central office other than the one that normally serves the caller.
