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:
Apr. 02, 2013
Filed:
Apr. 24, 2009
Katsuya Aboshi, Tokyo, JP;
Kunio Odaka, Tokyo, JP;
Kazutaka Shimoosako, Tokyo, JP;
Furukawa Electric Co., Ltd, Tokyo, JP;
Abstract
A subscriber premises side optical network unit, and an optical transmission system having the same, is provided that monitors whether or not a communication condition is established with a center side optical line termination and halts signals to be outputted to external nodes when the communication condition is not established. In an optical network unit (ONU), a signal output control means monitors whether or not the communication condition with an OLT is established and when it determines that the communication condition is not established, outputs an output halting request to loopback setting sections to control to assume a loopback state. Thereby, it becomes possible to halt the output of the signals from an interface module to a switch.