Glossary:

ATIS Telecom Glossary

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Select a term name to open its entry and any media references. Longer definitions end with a “Read More” link.

fair queuing

The controlling of congestion in gateways by restricting every host to an equal share of gateway bandwidth.
Note: Fair queuing does not distinguish between small and large hosts or between hosts with few active connections and those with many.

fake sector

In information assurance, a sector consisting of a header but no data, used in large numbers on a diskette to cause an unauthorized copying program to fail to copy the diskette. [2382-pt.8]

fall time

The time required for the amplitude of a pulse to decrease (fall) from a specified value (usually 90 percent of the peak value exclusive of overshoot or undershoot) to another specified value (usually 10 percent of the peak value exclusive of overshoot or undershoot).
Note: Limits on undershoot and oscillation, i.e., hunting, may need to be specified when specifying fall… (Read More →)

false clock

A condition where a phase-locked loop controlling a clock locks on a frequency other than the correct frequency.
Note 1: False clock can occur when there is excessive phase shift, as a function of frequency, in the loop.
Note 2: False clock often occurs where the false frequency is a harmonic of the correct frequency.

false lock

A condition where a phase-locked loop locks to a frequency other than the correct one, or to an improper phase.

fan-beam antenna

A directional antenna producing a main beam having a large ratio of major to minor dimension at any transverse cross section.

FAQ file

Abbreviation for Frequently Asked Questions file. An online file that contains frequently asked questions with answers provided to assist new users and avoid repetitive offline inquiries.
Note: An FAQ file is usually created for Internet news groups, but is also used in other applications.

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