four-wire repeater

four-wire repeater

[′fȯr ‚wīr ri′pēd·ər]
(electronics)
Telephone repeater for use in a four-wire circuit and in which there are two amplifiers, one serving to amplify the telephone currents in one side of the four-wire circuit, and the other serving to amplify the telephone currents in the other side of the four-wire circuit.