A telephone call, originating in or intended for a mobile station or a mobile Earth station, transmitted on all or part of its route over the radiocommunication channels of the mobile service or of the mobile-satellite service. [NTIA] [RR]

An international distress and calling frequency for mobile radiotelephone stations, survival craft, and emergency position-indicating radio beacons.
Note: An example of a radiotelephone distress frequency is 2180 kHz. [From Weik '89]

A telex call, originating in or intended for a mobile station or a mobile Earth station, transmitted on all or part of its route over the radiocommunication channels of the mobile service or the mobile-satellite service. [NTIA] [RR]

Remote Authentication Dial In User Service

Redundant Array of Independent Disks

[A] set of publications that interpret Orange Book requirements for trusted systems. [INFOSEC-99]

Acronym for random access memory.

Synonym fiber amplifier.

The generation of many different wavelengths of light from a nominally single-wavelength source (a) by means of lasing action and interaction with molecules, thereby creating many different excited molecular energy levels that will produce photons of various energy levels, i.e., various wavelengths, when transitions to lower excited states occur and (b) by the beating together of two frequencies, thus inducing… (Read More →)

A communications technique in which radio users share one wide frequency band instead of each user's being assigned a narrow band.