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:
Jul. 02, 1996
Filed:
Feb. 14, 1994
Tetsuya Uchida, Kawasaki, JP;
Fujitsu Limited, Kanagawa, JP;
Abstract
A node for a ring type synchronous optical network can continue to communicate with another node, when a transmission path is interrupted, located on the opposite side of the interrupted transmission path. A cross connecting unit cross connects the ring type transmission path with an external transmission path. The cross connecting unit generates and sends to another node an alarm indication signal when the ring type optical path is interrupted. A path switching unit switches the connection of an external transmission path to either direction of the ring type transmission path. A controlling unit controls the path switching unit, when an alarm indication signal is received from another node, so that the path switching unit switches the connection to a side opposite to a side from which the alarm indication signal has been received.