quadruplex
A kind of telegraphy system developed by Thomas A. Edison in the 1870s combining diplex and duplex communications to support simultaneous transmission of two messages in each direction.
Last updated: 2000-04-02
Nearby terms:
Quadrature Amplitude Modulation ♦ quadruple bucky ♦ quadruplex ♦ Quake ♦ Qualcomm
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