Accession Number : ADP000554

Title :   Open-Circuit Admittance of a Telephone Cable Pair,


Personal Author(s) : Olszewski,J. A. ; Gerdes,R. J.

Report Date : NOV 1982

Pagination or Media Count : 6

Abstract : A simple delta form of open-circuit admittance diagram, representing a pair in a multi-pair telephone cable, has served well for many years both cable designers and cable users. Recent interest, however, in the mechanism of water entry into filled cable cores, has shown inadequacies of this diagram inasmuch as it could not pass the basic examination of a limiting case capacitances presented by water flooding of the cable core. Furthermore, this commonly accepted diagram cannot explain an apparent anomaly of a negative dissipation factor obtained from measurement of open-circuit wire-to-wire admittance of a moisture logged cable. This paper proposes modifications of the pertinent open-circuit admittance components and shows that the modified circuit passes all the critical examinations, including explanation of the measured negative dissipation factor of the wire-to-wire branch. (Author)

Descriptors :   *Fiber optics transmission lines, *Electric cables, *Electric wire, *Symposia, *Telephone systems, Circuits, Flooding, Cores, International

Distribution Statement : APPROVED FOR PUBLIC RELEASE