A point-to-point data link between two units which provides for simultaneous transmission and reception of data (duplex).

For the host service tactical forces, the total power requirements for communications, including the requirements for weapons, detection, command and control systems, and related support functions.
Note: The tactical load is a part of the operational load.

Acronym for tactical data information link.

Acronym for Tactical Automatic Digital Switching System.

See flag, label.

A file format used to store an image using the particular data structure of the file.

Abbreviation for International Atomic Time.

A communications line from the end of a major transmission link, such as a microwave link, satellite link, or LAN, to the end-user location.
Note: A tail circuit is a part of a user-to-user connection.

To gain unauthorized physical access by following an authorized person through a controlled door. [2382-pt.8]

In facsimile systems, the excessive prolongation of the decay of the signal. Synonym hangover.