A procedure for obtaining bearings of radio frequency emitters by using a highly directional antenna and a display unit on an intercept receiver or ancillary equipment. [JP1]

In a facsimile transmitting apparatus, the scanning of the plane (developed in the case of a drum transmitter) of the message surface along lines running from right to left commencing at the top so that scanning commences at the top right-hand corner of the surface and finishes at the bottom left-hand corner; this is equivalent to scanning over a right-hand… (Read More →)

An antenna in which the radiation pattern is not omnidirectional, i.e., a nonisotropic antenna.

A transmission coupling device for separately sampling (through a known coupling loss) either the forward (incident) or the backward (reflected) wave in a transmission line.
Note: A directional coupler may be used to sample either a forward or backward wave in a transmission line. A unidirectional coupler has available terminals or connections for sampling only one direction of transmission; a… (Read More →)

The temporary conversion of a portion or all of a two-way trunk group to one-way trunks favoring traffic flowing away from a congested switch.
Note: Adjacent nodes must cooperate to accomplish directionalization.

1. Of an antenna, the ratio of (a) 4 times the radiance, i.e., power radiated per unit solid angle (watts per steradian), in a given direction to (b) the total power, i.e., the power radiated to 4 steradians.
Note 1: The directive gain is usually expressed in dB.
Note 2: The directive gain is relative to an isotropic antenna.
Note… (Read More →)

Synonym radiation pattern.

A directory protocol that defines the exchange of requests and outcomes between user and system. [T1.667-1999]

A service providing the requested telephone number for a given name and address.

After the telephone number has been received, DACC is a service that permits a call to be completed to the requested number, typically at the calling party's option for an additional charge.