supervisory signal

См. также в других словарях:

• supervisory signals —    A signal such as on hook or off hook, that indicates whether a circuit or line is in use …   IT glossary of terms, acronyms and abbreviations

• Pilot signal — In telecommunications, a pilot is a signal, usually a single frequency, transmitted over a communications system for supervisory, control, equalization, continuity, synchronization, or reference purposes. Frequency spectrum of an FM broadcast… …   Wikipedia

• loop-start —    Supervisory signal, initiated by an off hook telephone, received at the PBX or local exchange that closes a DC loop and initiates service …   IT glossary of terms, acronyms and abbreviations

• Loop start — In telecommunications, a loop start is a supervisory signal given by a telephone or PBX in response to the completion of the loop circuit, commonly referred to as off hook . When idle, or on hook , the loop is at 48V DC (provided by the CO or FXS …   Wikipedia

• Videophone — A videophone, also known by the trademarked name Picturephone , is a telephone which is capable of both audio and video duplex transmission. It differs from videoconferencing in that it expects to serve individuals, not groups.Early historyIn… …   Wikipedia

• Blue box (phreaking) — An early phreaking tool, the blue box is an electronic device that simulates a telephone operator s dialing console. It functions by replicating the tones used to switch long distance calls and using them to route the user s own call, bypassing… …   Wikipedia

• сигнал занятости приборов соединительных линий — — [Л.Г.Суменко. Англо русский словарь по информационным технологиям. М.: ГП ЦНИИС, 2003.] Тематики информационные технологии в целом EN supervisory signal …   Справочник технического переводчика

• Executive functions — Psychology …   Wikipedia

• telemetry — te·lem·e·try (tə lĕmʹĭ trē) n. The science and technology of automatic measurement and transmission of data by wire, radio, or other means from remote sources, as from space vehicles, to receiving stations for recording and analysis.   tel… …   Universalium

• Economic Affairs — ▪ 2006 Introduction In 2005 rising U.S. deficits, tight monetary policies, and higher oil prices triggered by hurricane damage in the Gulf of Mexico were moderating influences on the world economy and on U.S. stock markets, but some other… …   Universalium

• control system — Means by which a set of variable quantities is held constant or caused to vary in a prescribed way. Control systems are intimately related to the concept of automation but have an ancient history. Roman engineers maintained water levels in… …   Universalium