Four-wire repeater

From International Dictionary of Marine Aids to Navigation
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5-4-250

A repeater for use in a four-wire or four-wire type circuit in which there are two amplifiers, one amplifying the signals in one channel and the other amplifying the signals in the other channel of the circuit.

Reference: I.E.C. (modified)




Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)