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Frequency-change signaling

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This is an old revision of this page, as edited by 213.253.40.156 (talk) at 15:51, 25 February 2002 (from Federal Standard 1037C). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
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In telecommunication, a frequency-change signaling is a signaling method in which one or more discrete frequencies correspond to each desired significant condition of a code.

Note 1: The transition from one set of frequencies to the other may be a continuous or a discontinuous change in frequency or in phase.

Note 2: Frequency-change signaling may be used in both supervisory signaling and data transmission.

Source: from Federal Standard 1037C and from MIL-STD-188

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