Definition of phantom circuit in English:

phantom circuit

Line breaks: phan|tom cir|cuit


  • An arrangement of telegraph or other electric wires equivalent to an extra circuit.
    More example sentences
    • If a telephone company was not happy with a gain of one circuit from two pairs, they could always take two phantom circuits, additional repeat coils and "phantom the phantoms" to obtain seven circuits over four pairs of wire.
    • Engineers commonly called duplexed telephone circuits ‘phantom circuits’ or simply ‘phantoms.’

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