Transmission path between nearby telephone central offices

Details Transmission path between nearby telephone central offices Transmission path between nearby telephone central offices

1975-12-02

1977-11-15

Grimley, Arthur T.

Electricity: conductors and insulators

Anti-inductive structures

Conductor transposition

174 27, 174110F, 174110PM, H01B 1104

Patent

active

040586693

ABSTRACT:
A multipair telephone cable especially designed to carry interoffice traffic consists of copper conductors insulated with expanded plastic with or without a solid plastic skin. The copper gauge size, insulation expansion factor and dielectric diameter are uniquely designed to consume a minimum of cable cross-section area while permitting use of the cable to provide voice frequency circuits in a manner comparable to normal; 24-gauge cable as well as to provide carrier frequency circuits operating in the range of from about 100 kHz to 8.0 MHz comparably to normal 22-gauge cable. The cable includes pairs twisted according to a constant twist frequency spacing concept.

REFERENCES:
patent: 3040278 (1962-06-01), Griemsmann
patent: 3968463 (1976-07-01), Boysen

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