Telephone transmission system

Details Telephone transmission system Telephone transmission system

1974-02-07

1976-01-13

Claffy, Kathleen H.

H04B 154, H04B 158

Patent

active

039327124

ABSTRACT:
A telephone system comprises a non-loaded, non-equalized cable interconnecting a pair of communication terminals so that audio signals are translated in one direction and modulated carrier signals are translated in the other direction. A direct current bypass circuit is provided at each terminal to allow the transmission of direct current supervisory signals and battery potential over the non-loaded, non-equalized cable.

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patent: 3700817 (1972-10-01), Garcia et al.
patent: 3778563 (1973-12-01), Bise et al.

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