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FUTURE OF TRANSOCEANIC TELEPHONY*

Nature volume 150, pages 6062 (11 July 1942) | Download Citation

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Abstract

TELEPHONY was born from telegraphy by an expansion of the band of frequencies employed in the electrical transmission of intelligence. More recently, further expansion has produced improvement of quality of transmitted speech and an increase of the number of simultaneously transmitted conversations. To-day, speech can be transmitted overland perfectly for any distance and with hundreds of conversations at once over a single coaxial line.

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https://doi.org/10.1038/150060a0

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