The term "Transmission Measuring (105 Type) Test Line/Responder" denotes an arrangement in an end office which provides far-end access to a responder and permits two-way loss and noise measurements to be made on trunks from a near end office.

Any material substance, such as fiber-optic cable, twisted-wire pair, coaxial cable, dielectric-slab waveguide, water, and air, that can be used for the propagation of signals, usually in the form of modulated radio, light, or acoustic waves, from one point to another.
Note: By extension, free space can also be considered a transmission medium for electromagnetic waves, although it is not… (Read More →)

1. See communications security.
2. [A] Component of COMSEC resulting from the application of measures designed to protect transmissions from interception and exploitation by means other than cryptanalysis. [INFOSEC-99]

[A] key that is used in the control of TRANSEC (transmission security) processes, such as frequency hopping and spread spectrum. [INFOSEC-99]

In video systems, the one-way transmission path between two designated points.

The term "Transmission Specifications" denotes the appropriate limits, e.g., acceptance and immediate action limits, of the Access Service transmission parameters.

Part of a communication system organized to accomplish the transfer of information from one point to one or more other points by means of signals.
Note: Examples of NATO-owned transmission systems are SATCOM, ACE HIGH and CIP-6
7. [NATO]

In facsimile, the interval between the start of picture signals and the detection of the end-of-message signal by the receiver for a single document.

Synonym spectral window. See window.

Obsolete. See transmittance.