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:
Jan. 12, 2016
Filed:
Dec. 18, 2012
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Shinya Tamaki, Tokyo, JP;
Tomoaki Yoshida, Tokyo, JP;
Hirotaka Nakamura, Tokyo, JP;
Shin Kaneko, Tokyo, JP;
Shunji Kimura, Tokyo, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Abstract
An OLT controller makes each optical transceiver transmit a search signal at a prescribed time so that the search signals reach all ONU connection ends of an optical transmission path. In the case where an ONU connected to the ONU connection end of the optical transmission path is unregistered, when the ONU controller receives the search signal, the ONU controller tunes a wavelength of an optical transmitter of the ONU to a wavelength corresponding to the search signal and makes the optical transmitter transmit a response signal to an OLT.