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:
Dec. 01, 1987
Filed:
Jul. 11, 1985
Takeshi Kitahara, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A token-passing type loop transmission system including a plurality of node stations and first and second loop transmission lines, which lines transmit signals in opposite directions. Each node station includes a first and second loop-back circuits and a ring control circuit. The ring control circuit monitors signals passing through the node station, changes end paths in the first and second loop-back circuits to operatively connect the first and second loop transmission lines or to restore the first and second loop transmission lines to a normal state in each loop-back circuit, and transmits a signal on the first or second loop transmission line through the first or second loop-back circuit. By the combination of operations of the node stations, the loop transmission system performs automatic loop configuration control of detection of a fault point therein and constructs a transmission loop line not including the fault point.