Automatic line defect detector

Details Automatic line defect detector Automatic line defect detector

1990-09-17

1992-06-09

Schreyer, Stafford D.

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Testing of network terminating interface, subscriber trunk...

379 29, 324533, 324535, H04M 124, H04M 330, G01R 3111

Patent

active

051214202

ABSTRACT:
Method and apparatus for detecting and sectionalizing troubles on telephone lines automatically. Specifically, an embodiment for detecting and sectionalizing troubles on a telephone line connecting a switching machine and a subscriber telephone set connected thereto over the telephone line, includes apparatus which: (a) emits a pulse over the telephone line; (b) detects reflections of the pulse; and (c) and determines whether a reflection was received prior to the expiration of a predetermined time period. The predetermined period relates to a distance which is less than the length of the telephone line between the switching machine and the subscriber telephone set.

REFERENCES:
patent: 4104582 (1978-08-01), Lambertsen

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