See network topology.

Frequencies from 300 GHz to 3000 GHz. See electromagnetic spectrum.

Acronym for tri-services tactical. See tactical communications.

Equipment that (a) accommodates the transition from current manual and analog systems to fully automated digital systems and (b) provides for message switching, voice communications circuit switching, and the use of secure voice terminals, digital facsimile systems, and user digital voice terminals.

A specialized form of coaxial cable, circular in cross-section and consisting of (a) a center conductor, often a solid wire but sometimes braided; separated by an insulating material from (b) a concentric solid or braided conductor which is in turn separated by an insulating material from (c) a third solid or braided conductor, concentric with the first two; and (d)… (Read More →)

A circuit between a tributary office and a toll switchboard or intertoll dialing equipment in a toll center city. [47 CFR Pt.36-A]

A local office which is located outside the exchange in which a toll center is located, which has a different rate center from its toll center and which usually tickets and times only a part of its originating toll traffic, but which may ticket or time all or none, of such traffic. The toll center handles all outward traffic not… (Read More →)

1. In a data network, a station other than the control station.
2. On a multipoint connection or a point-to-point connection using basic mode link control, any data station other than the control station.

In a crystal oscillator, the degradation of frequency-vs. -temperature stability, and marked frequency offset, resulting from frequency adjustment which produces a rotation or distortion, or both, of the inherent frequency-vs. -temperature characteristic.

An encryption algorithm whose key consists of three DES (Data Encryption Standard) keys, which is also referred to as a key bundle.
Note 1: A DES key consists of 64 binary digits ("0"s or "1"s) of which 56 bits are randomly generated and used directly by the algorithm. (The other 8 bits, which are not used by the algorithm, may… (Read More →)