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. 07, 2025
Filed:
Aug. 24, 2020
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Shin Kaneko, Musashino, JP;
Kazuaki Honda, Musashino, JP;
Hiroo Suzuki, Musashino, JP;
Junichi Kani, Musashino, JP;
Takuya Kanai, Musashino, JP;
Yasunari Tanaka, Musashino, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Abstract
The optical communication system includes the optical distribution device () provided between the wavelength routing device () and the optical multiplexing/demultiplexing device (). The wavelength routing device outputs the optical signal input from the port on the wavelength variable subscriber device side to the port uniquely determined by a combination of the wavelength of the optical signal and the port to which the optical signal is inputted. The wavelength variable subscriber device can execute the first protection for switching the wavelength of the optical signal to be transmitted and received to the spare wavelength different from the operating wavelength when the wavelength variable subscriber device and the wavelength variable communication device () are disconnected. Then, the optical distribution device can execute the second protection for switching the optical fiber transmission path () to be used when the wavelength variable subscriber device and the wavelength variable communication device are disconnected.