- Industry: Telecommunications
- Number of terms: 29235
- Number of blossaries: 0
- Company Profile:
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.
An aggregate of 60 voice-frequency channels, i.e., five groups, transmitted as a unit through a carrier system.
Industry:Telecommunications
An AIS-provided restriction to prevent a program from accessing data in another user's segment of storage. 2. An information-system (IS) hardware-provided restriction to prevent a program from accessing data in another user's segment of storage.
Industry:Telecommunications
An alerting indication to a condition that may have immediate or potential negative impact on the state of the monitored network element (NE. )
Industry:Telecommunications
An alias for an IP address or server operated by an Internet Presence Provider or an Internet Service Provider. The virtual domain allows individuals or companies to have a domain name without the effort and cost of maintaining a server.
Industry:Telecommunications
An all-dielectric waveguide in which electromagnetic waves are guided by a refractive index gradient so that the waves are confined to the guide by refraction or reflection from the outer surface of the guide or from surfaces within the guide. Note 1: In an open waveguide, the electromagnetic waves propagate, without radiation, within the waveguide, although evanescent waves coupled to internal waves may travel in the space immediately outside the waveguide. Note 2: Examples of open waveguides are (a) optical fibers and (b) planar waveguides in integrated optical circuits.
Industry:Telecommunications
An alphabet in which (a) 128 unique 7-bit strings are used to encode upper- and lower-case letters, 10 decimal numerals, special signs and symbols, diacritical marks, data delimiters, and transmission control characters, (b) 12 of the 7-bit strings are not assigned to any letter, numeral, or control character, and (c) the unassigned bit strings are open for use in a given country that may have unique requirements, such as monetary symbols; diacritical marks, such as the tilde, umlaut, circumflex, and dieresis, and (d) a two-condition 8-bit pattern may be used that consists of seven information bits and a parity check bit. Note: ITA-5 is used for effecting information interchange. It is a result of a joint agreement between the International Telegraph and Telephone Consultative Committee (CCITT,) now ITU-T, of the International Telecommunication Union (ITU) and the International Organization for Standardization (ISO. ) It is published as CCITT (ITU-T) Recommendation V. 3 and as ISO 646. It has also been adopted by NATO for military use. The United States adaptation of ITA-5 is ASCII (American Standard Code for Information Interchange) published by the American National Standards Institute (ANSI. ) Synonym International Reference Alphabet (IRA. )
Industry:Telecommunications
An amplifier that (a) has a very low noise level, (b) has a main oscillator that is tuned to the received frequency, (c) has another pumping oscillator of a different frequency that periodically varies the parameters, i.e., the capacitance or inductance, of the main oscillator circuit, and (d) enables amplification of the applied signal by making use of the energy from the pumping action. Note: Paramps with a variable-capacitance main-oscillator semiconductor diode are used in radar tracking and communications Earth stations, Earth satellite stations, and deep-space stations. The noise temperature of paramps cooled to the temperature of liquid helium, about 5 K, is in the range of 20 to 30 K. Paramp gains are about 40 dB.
Industry:Telecommunications
An amplifier used to enhance the transmission reliability of a usually digital intrafacility metallic transmission line, over extended distances, by driving the input to the transmission line with a higher than normal signal level. Note: An example of a line driver is an amplifier used to extend the range of an RS-232C digital signal beyond 50 feet (~15 m) while maintaining a specified bit-error ratio.
Industry:Telecommunications
An amplitude modulated emission with one sideband only.
Industry:Telecommunications
An analog device that amplifies an input signal regardless of its nature, i.e., analog or digital. 2. A digital device that amplifies, reshapes, retimes, or performs a combination of any of these functions on a digital input signal for retransmission. Note: The term "repeater" originated with telegraphy and referred to an electromechanical device used to regenerate telegraph signals. Use of the term has continued in telephony and data communications. 3. A fixed transmitter that retransmits the signals of other stations.
Industry:Telecommunications
