- Industry: Telecommunications
- Number of terms: 29235
- Number of blossaries: 0
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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.
The transmission media and the intervening equipment used for the transfer of data between data terminal equipments (DTEs. ) Note 1: A data transmission circuit includes any required signal conversion equipment. Note 2: A data transmission circuit may transfer information in (a) one direction only, (b) either direction but one way at a time, or (c) both directions simultaneously.
Industry:Telecommunications
With respect to an electrical and especially an electronic device, to turn on or otherwise connect its primary source of electric power.
Industry:Telecommunications
The volume of space, usually approximately conical with its vertex at the antenna, that cannot be scanned by an antenna because of limitations of the antenna radiation pattern and mount. Note: An example of an antenna blind cone is that of an air route surveillance radar (ARSR. ) The horizontal radiation pattern of an ARSR antenna is very narrow. The vertical radiation pattern is fan-shaped, reaching approximately 70° of elevation above the horizontal plane. As the antenna is rotated about a vertical axis, it can illuminate targets only if they are 70° or less from the horizontal plane. Above that elevation, they are in the antenna blind cone. Synonym cone of silence.
Industry:Telecommunications
The short-term variations of the significant instants of a digital signal from their ideal positions in time. Here short term implies phase oscillations of frequency greater than or equal to 10 Hz. Timing jitter may lead to crosstalk and/or distortion of the original analog signal and is a potential source of slips at the input ports of digital switches. It may also cause slips and resultant errors in asynchronous digital multiplexes.
Industry:Telecommunications
The sum of random noise, intermodulation noise, and crosstalk. Note: Total channel noise does not include impulse noise because different techniques are required for its measurement.
Industry:Telecommunications
The system containing the data base information to be used in validation of the telecommunications charge card or billed number screening data.
Industry:Telecommunications
To duplicate the functions of one system with a different system, so that the second system appears to behave like the first system. Note: For example, a computer emulates another, different computer by accepting the same data, executing the same programs, and achieving the same results.
Industry:Telecommunications
The sum of a group of data items, which sum is used for checking purposes. Note 1: A checksum is stored or transmitted with the group of data items. Note 2: The checksum is calculated by treating the data items as numeric values. Note 3: Checksums are used in error detecting and correcting. 2. The value computed on data to detect error or manipulation during transmission. See hash total.
Industry:Telecommunications
The total power requirements for communications facilities.
Industry:Telecommunications
The use of auxiliary storage as buffer storage to reduce processing delays when transferring data between peripheral equipment and the processors of a computer. Note: The term is derived from the expression "simultaneous peripheral operation on line. "
Industry:Telecommunications
