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:
Feb. 04, 1997
Filed:
Jun. 05, 1995
Kenichiro Orita, Hadano, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A transmission line fault detecting method and system use fault detectors capable of sending and receiving a fault locating frame of an arbitrary length for reliably detecting the location in the transmission line where the fault occurred. A number of such fault detectors are incorporated in a ring transmission system, wherein each detector sends and receives a fault locating frame including a first frame bounded by a starting delimiter and an ending delimiter, and a second frame following the first frame and containing other data bounded by an ending delimiter. The fault locating frame has a large frame length, preferably on the order of 4000 bytes. The first frame is formatted according to the communication protocol inherent to the transmission system. The present invention advantageously enables even a fault of less significance to be detected with high reliability.