The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 18, 1993
Filed:
Jul. 25, 1990
Applicant:
Inventor:
David A Frisch, Yarrawarra, AU;
Assignees:
Tasman Cable Company, Alexandria, AU;
OTC Limited, Sidney, AU;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
375-31 ; 375-4 ; 370 131 ; 371 205 ;
Abstract
A fault location arrangement for either electrical or optical digital transmission systems is provided by a distinct diagnostic signal at each of a series of regenerators which is used to modulate data signals. The modulated data signals are then recovered by demodulation and analyzed to determine the status of each regenerator. Diversion of signals by 'loop-back' at each regenerator is also provided for.