Meaning busy tone
What does busy tone mean? Here you find 3 meanings of the word busy tone. You can also add a definition of busy tone yourself
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busy toneSynonym busy signal.
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busy toneA single tone that is interrupted at 60 ipm (impulses per minute) to indicate that the terminal point of a call is already in use. BYPASS (BP)
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busy toneLow tone, interrupted once per second, indicating that the called line is busy. Bypass
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