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.

dragging

The act of modifying all or part of the display on a monitor by selecting some object and moving the pointing device such that the displayed object moves in conjunction with the pointer. [T1.232-1996]

drift

A comparatively long-term change in an attribute or value of a system or equipment operational parameter.
Note 1: The drift should be characterized, such as "diurnal frequency drift" and "output level drift. "
Note 2: Drift is usually undesirable and unidirectional, but may be bidirectional, cyclic, or of such long-term duration and low excursion rate as to be negligible.

DRM

Digital Rights Management

drop

1. In a communications network, the portion of a device directly connected to the internal station facilities, such as toward a switchboard or toward a switching center.
2. The central office side of test jacks.
3. A wire or cable from a pole or cable terminus to a building.
4. To delete, intentionally or unintentionally, or to lose part of… (Read More →)

drop and insert

In a multichannel transmission system, a process that diverts (drops) a portion of the multiplexed aggregate signal at an intermediate point, and introduces (inserts) a different signal for subsequent transmission in the same position, e.g., time slot or frequency band, previously occupied by the diverted signal.
Note 1: Signals not of interest at the drop-and-insert point are not diverted.
Note… (Read More →)

drop channel operation

Operation in which one or more channels of a multichannel system are terminated, i.e., dropped, at an intermediate point between the end terminals of the system.

drop repeater

In a multichannel communications system, a repeater that has the necessary equipment for the local termination, i.e., the dropping, of one or more channels.

dropout

1. In a communications system, a momentary loss of signal.
Note: Dropouts are usually caused by noise, propagation anomalies, or system malfunctions.
2. A failure to read properly a binary character from data storage.
Note: A dropout is usually caused by a defect in the storage medium or by a malfunction of the read mechanism.
3. In magnetic tape, disk,… (Read More →)

Showing 2,701–2,710 of 9,487 results