The design of the Cleveland-Toledo underground telephone cable project

The design of the Cleveland-Toledo underground telephone cable project

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It uses a small current of about 5 mils at metallic 34 volts in order to avoid interference with the telephone circuit with which it is ... of l2 telegraph circuits, operating in a band of frequencies within the voice range, over one four-wire cable circuit.


Title:The design of the Cleveland-Toledo underground telephone cable project
Author: Ralph Norton Greenman, John Eliseus Noran
Publisher: - 1937
ISBN-13:

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