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frequency signaling channel

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См. также в других словарях:

  • Multi-frequency signaling — In telephony, multi frequency signaling (MF) is an outdated, in band signaling technique. Numbers were represented in a two out of five code for transmission from a multi frequency sender, to be received by a multi frequency receiver in a distant …   Wikipedia

  • Single-frequency signaling — (SF) is line signaling (in telephony) in which dial pulses or supervisory signals are conveyed by a single voice frequency tone in each direction. SF and similar systems were used in 20th century carrier systems.An SF signaling unit converts DC… …   Wikipedia

  • Signaling System 7 — Signaling System #7 (SS7) is a set of telephony signaling protocols which are used to set up most of the world s public switched telephone network telephone calls. The main purpose is to set up and tear down telephone calls. Other uses include… …   Wikipedia

  • Signaling (telecommunications) — In telecommunication, signaling (signalling in British spelling) has the following meanings: the use of signals for controlling communications the information exchange concerning the establishment and control of a telecommunication circuit and… …   Wikipedia

  • Frequency modulation — See also: Amplitude modulation In telecommunications, frequency modulation (FM) conveys information over a carrier wave by varying its frequency (contrast this with amplitude modulation, in which the amplitude of the carrier is varied while its… …   Wikipedia

  • Control channel — In radio communication, a control channel is a central channel that controls other constituent radios by handling data streams. It is most often used in the context of a trunked radio system, where the control channel sends data which coordinates …   Wikipedia

  • Multi-frequency — In telephony Multi Frequency (MF) is an outdated, in band signaling technique. Numbers were represented in a two out of five code for transmission from a Multi Frequency Sender, to be received by a Multi frequency receiver in a distant telephone… …   Wikipedia

  • In-band signaling — In telecommunications, in band signaling is the sending of metadata and control information in the same band, on the same channel, as used for data.TelephoneFor example, when dialing a modern telephone, the telephone number is encoded and… …   Wikipedia

  • SOFAR channel — The SOFAR channel (short for Sound Frequency and Ranging channel), or deep sound channel (DSC),[1] is a horizontal layer of water in the ocean at which depth the speed of sound is minimal. The SOFAR channel acts as a waveguide for sound, and low… …   Wikipedia

  • Robbed-bit signaling — (RBS) is a specific type of Channel Associated Signaling in use in North America on T1 trunks, and perhaps elsewhere in the world.RBS was developed at the time that AT T was moving from analog trunks onto digital equipment. This permitted AT T to …   Wikipedia

  • Separate channel signaling — is a form of signaling in which the whole or a part of one or more channels in a multichannel system is used to provide for supervisory and control signals for the message traffic channels. The same channels, such as frequency bands or time slots …   Wikipedia

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