- Industry: Telecommunications
- Number of terms: 29235
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ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards for the information, entertainment and communications industry.
A language that need not be modified, translated, or interpreted before it can be used by the processor for which it was designed. Note 1: The operation codes and addresses used in instructions written in machine language can be directly sensed by the arithmetic and control unit circuits of the processor for which the language is designed. Note 2: Instructions written in an assembly language or a high-level language must be translated into machine language before they can be executed by a processor. Note 3: Machine languages are usually used by computer designers rather than computer users.
Industry:Telecommunications
A large computer, usually one to which other computers and/or terminals are connected to share its resources and computing power.
Industry:Telecommunications
A larger cell that physically overlays one or more smaller cells. For example, intra-building cells may be encompassed by a larger campus cell.
Industry:Telecommunications
A laser that is constructed by thin-film deposition techniques on a substrate for use as a light source, is usually used to drive thin-film optical waveguides, and may be used in integrated optical circuits.
Industry:Telecommunications
A laser that uses a forward-biased semiconductor junction as the active medium. Note: Stimulated emission of coherent light occurs at a p-n junction where electrons and holes are driven into the junction. Synonyms diode laser, laser diode, semiconductor laser. See figure on following page.
Industry:Telecommunications
A last-choice trunk group that receives overflow traffic, may receive first-route traffic and for which there is no alternate route. There are various types of final trunk groups, differentiated by the type of traffic that they carry.
Industry:Telecommunications
A law defining the relative values of the quantum steps used in quantizing and encoding signals.
Industry:Telecommunications
A law of geometric optics that defines the amount of bending that takes place when a light ray strikes a refractive boundary, e. G. , an air-glass interface, at a non-normal angle. Note 1: Snell's law states that where n1 is the index of refraction of the medium in which the incident ray travels, 1 is the angle, with respect to the normal at the refractive boundary, at which the incident ray strikes the boundary, n2 is the index of refraction of the medium in which the refracted ray travels, and 2 is the angle, with respect to the normal at the refractive boundary, at which the refracted ray travels. The incident ray and refracted ray travel in the same plane, on opposite sides of the normal at the point of incidence. Note 2: If a ray travels from a medium of lower refractive index into a medium of higher refractive index, it is bent toward the normal; if it travels from a medium of higher refractive index to a medium of lower index, it is bent away from the normal. Note 3: If the incident ray travels in a medium of higher refractive index toward a medium of lower refractive index at such an angle that Snell's law would call for the sine of the refracted ray to be greater than unity (a mathematical impossibility); i.e., then the "refracted" ray in actuality becomes a reflected ray and is totally reflected back into the medium of higher refractive index, at an angle equal to the incident angle (and thus still "obeys" Snell's Law. ) This reflection occurs even in the absence of a metallic reflective coating (e. G. , aluminum or silver. ) This phenomenon is called "total internal reflection. " The smallest angle of incidence, with respect to the normal at the refractive boundary, which angle will support total internal reflection, is called the "critical angle. "
Industry:Telecommunications
A letter, digit, or other symbol that is used as part of the organization, control, or representation of data. 2. One of the units of an alphabet.
Industry:Telecommunications
