A brief history of technological advances in telephony which include improvements in transmission media, reduction of interference, signal reinforcement (amplification), and multiplexing is presented.
CITATION STYLE
ZAMIEROWSKI JJ, & JR. (1969). 100 YEARS OF PROGRESS. Western Elec Engr, 13(3), 15–17. https://doi.org/10.1021/cen-v029n001.p009
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