- single-frequency tone
- одночастотный тон;
чистый [неискаженный] тон
Большой англо-русский и русско-английский словарь. 2001.
single-frequency tone
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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
single-frequency signaling — A signaling system that uses a 2600Hz in band signal on the voice path. The tone is on in the idle condition, pulsed for dialing, and off when the circuit is in use … IT glossary of terms, acronyms and abbreviations
Tone letter — Register (level) tone ˥ ˦ ˧ ˨ ˩ IPA number 519–523 Entity … Wikipedia
Tone — A&V Typically refers to a single frequency audio signal used as a level setting reference … Audio and video glossary
Off-hook tone — The off hook tone (also receiver off hook tone or off hook warning) is a telephony signal used to alert a user that the telephone has been left off hook for an extended period, effectively disabling the telephone line. See permanent signal.… … Wikipedia
tone dialing — noun a system of telephone dialing in which each digit is transmitted as a burst of a single audio frequency … Wiktionary
frequency — The number of regular recurrences in a given time, e.g., heartbeats, sound vibrations. [L. frequens, repeated, often, constant] best f. SYN: characteristic f.. characteristic f. f. at which a given neuron responds to the least sound intensity.… … Medical dictionary
Continuous Tone-Coded Squelch System — In telecommunications, Continuous Tone Coded Squelch System or CTCSS is a circuit that is used to reduce the annoyance of listening to other users on a shared two way radio communications channel. It is sometimes called tone squelch. Where more… … Wikipedia
Orthogonal frequency-division multiplexing — Passband modulation v · d · e Analog modulation AM · … Wikipedia
Combination tone — A combination tone, also called a sum tone or a difference tone (also occasionally resultant tone), can be any of at least three similar psychoacoustic phenomena. When two tones are played simultaneously, a listener can sometimes perceive an… … Wikipedia
Answer tone — is a feature of wireline modems.The answer tone is the first signal sent by the answering modem after the billing delay. In its most basic form, it is a single continuous tone with a frequency of 2100 Hz (or 2225 Hz for Bell modes). It is the… … Wikipedia
