Fast-busy-signal definition

(telephony) An audible signal on a voice phone line that sounds more frequently than a standard busy singal, indicating that no transmission path to the called phone number is available.
noun
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A signal indicating to the calling party that network resources are not available to process the call. Synonymous with reorder tone. See also busy signal.
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Other Word Forms

Noun

Singular:
fast-busy-signal
Plural:
fast-busy-signals