1. The time required for a signal to travel from one point to another.
2. In cryptography, the delay between the presentation of a clear text block to a TDEA mode and the availability of the resulting encrypted text. [After X9.52]

The manner in which radio signals travel from a transmitting antenna to a receiving antenna, such as ground wave, sky wave, direct wave, ground reflection, or scatter.

A man-made or natural physical feature that lies near enough to a radio path to cause a measurable effect on path loss, exclusive of reflection effects.
Note: An obstruction may lie to the side, above, or below the path. Ridges, bridges, cliffs, buildings, and trees are examples of obstructions. If the clearance from the nearest anticipated path position, over the… (Read More →)

The time required for a signal to travel from one point to another.

Material and information relating to or associated with a company's products, business, or activities, including but not limited to financial information; data or statements; trade secrets; product research and development; existing and future product designs and performance specifications; marketing plans or techniques; schematics; client lists; computer programs; processes; and know-how that have been clearly identified and properly marked by the… (Read More →)

Documentation by a commercial entity specifying equipment, practices, or operations unique to that commercial entity.

1. The proportional distribution or allocation of parameters, such as noise power and transmission losses, among a number of tandem-connected items, such as equipment, cables, links, or trunks, in order to balance the performance of communications circuits. Synonym budgeting.
2. In a telephone switching center, the distribution or allocation of equipment or components proportionally among a number of functions, to… (Read More →)

A central office code assigned in one NPA that is not available for assignment in an adjacent NPA in order to permit 7-digit dialing across the NPA boundary.

Telecommunications delivering their protection through use of type 2 products or data encryption standard equipment. [INFOSEC-99]

[A] wireline or fiber-optic distribution system used to transmit unencrypted classified national security information through an area of lesser classification or control. [INFOSEC-99]
Note: A complete protected distribution system includes the subscriber and terminal equipment and the interconnecting lines. Deprecated synonym approved circuit.