Glossary:

ATIS Telecom Glossary

Search Keyword By: all

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

disengagement-denial probability

The ratio of disengagement attempts that result in disengagement denial to the total disengagement attempts counted during a measurement period.

disk pack

An assembly of magnetic disks that can be removed as a whole from a disk drive together with a container from which the assembly must be separated when operating.

diskette

In computer technology, a small disk of flexible plastic, coated with a magnetizable material and enclosed in a protective jacket, used to store digital data.
Note: A diskette is distinguished from a hard disk by virtue of the fact that it is flexible, and unlike most hard disks, is removable from its drive. Synonyms flexible disk, floppy disk.

disparity

In pulse-code modulation (PCM), the digital sum, i.e., the algebraic sum, of a set of signal elements.
Note: The disparity will be zero and there will be no cumulative or drifting polarization if there are as many positive elements (those that represent 1) as there are negative elements (those that represent 0).

Dispatchable Location

A location delivered to the PSAP by a CMRS provider with a 911 call that consists of the street address of the calling party, plus additional information such as suite, apartment or similar information necessary to adequately identify the location of the calling party.

Dispatchable Location (DL)

A location delivered to the PSAP by a CMRS provider with a 911 call that consists of the street address of the calling party, plus additional information such as suite, apartment or similar information necessary to adequately identify the location of the calling party.

dispersion

Any phenomenon in which the velocity of propagation of an electromagnetic wave is wavelength dependent.
Note 1: In communication technology, "dispersion" is used to describe any process by which an electromagnetic signal propagating in a physical medium is degraded because the various wave components (i.e., frequencies) of the signal have different propagation velocities within the physical medium.
Note 2: In… (Read More →)

dispersion-limited operation

Operation of a communications link in which signal waveform degradation attributable to the dispersive effects of the communications medium is the dominant mechanism that limits link performance.
Note 1: The amount of allowable degradation is dependent on the quality of the receiver.
Note 2: In fiber optic communications, "dispersion-limited operation" is often confused with "distortion-limited operation. "

Showing 2,591–2,600 of 9,487 results