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. 19, 1998
Filed:
May. 29, 1996
Applicant:
Inventor:
Tetsuya Uchida, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
370222 ; 370228 ; 340827 ;
Abstract
In a virtual ring configuration method and a virtual ring system, a plurality of nodes are set on a plurality of rings and the rings are cross-connected. Each node has a transmitting unit and a receiving unit for sending and receiving service information between the nodes by the SONET path. A judging unit is provided for judging whether or not there is an input of obstruction information by the SONET path. A path protection switch is provided at a receive terminal, which switches the receive terminal which receives the SONET path in cases where the judging unit judges that obstruction information has been received.