voice-frequency carrier

См. также в других словарях:

• Frequency-division multiplexing — (FDM) is a form of signal multiplexing where multiple baseband signals are modulated on different frequency carrier waves and added together to create a composite signal. Non telephoneFDM can also be used to combine multiple signals before final… …   Wikipedia

• Voice inversion — scrambling is an analog method of obscuring the content of a transmission. It sometimes used in public service radio, automobile racing, cordless telephones and the Family Radio Service. Without a descrambler, the transmission makes the speaker… …   Wikipedia

• carrier signaling —    Voice circuits sometimes use a telegraph carrier on one of the voice channels to carry all the associated supervision and signaling circuits; others may use a signaling frequency within the voice band (in band signaling), or in the guard band… …   IT glossary of terms, acronyms and abbreviations

• 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

• Carrier wave — In telecommunications, a carrier wave, or carrier is a waveform (usually sinusoidal) that is modulated (modified) with an input signal for the purpose of conveying information, [citeweb|title=Carrier wave with no modulation transports no… …   Wikipedia

• Voice of Russia — For the blues rock band, see Radio Moscow (band). Russian State Radio Company Voice of Russia Type Radio network …   Wikipedia

• T-carrier — In telecommunications, T carrier, sometimes abbreviated as T CXR , is the generic designator for any of several digitally multiplexed telecommunications carrier systems originally developed by Bell Labs and used in North America, Japan, and Korea …   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

• 12-channel carrier system — is a type of Frequency division multiplexing system. In this system twelve voice channels are multiplexed in a High Frequency Carrier and passed through balanced pair trunk lines similar to those used for Voice Frequency connections. The Bell… …   Wikipedia

• Orthogonal frequency-division multiplexing — Passband modulation v · d · e Analog modulation AM · …   Wikipedia

• L-carrier — SystemYearFrequencyCoax per cableDistance between repeatersVoice circuits per coaxL 119413 MHz48 miles600L 21942840 kHz416 miles360L 319538 MHz84 miles5,580L 4196717 MHz20 …   Wikipedia