Century Dictionary and Cyclopedia
- n. A system of duplexing on telegraph-lines by the use of condensers and the telephone as a receiver, devised by Edison.
- Of or pertaining to a system of telegraphy in which interrupted and undulatory currents' are used simultaneously in signaling over the same wire.
“Edison's phonoplex normally doubled the capacity of telegraph lines, whether employed on way business or through traffic, but in actual practice made it possible to obtain more than double service.”
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