acoustic coupler

noun Computers.
a modem designed to connect a telephone handset to a computer terminal or processor.

1965–70 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
acoustic coupler
computing See also modem a device converting computer-data signals into acoustic form for transmission down a telephone line, through the handset microphone

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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