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:
Nov. 04, 2008
Filed:
Jul. 20, 2005
Yoshio Nogi, Fujisawa, JP;
Tomohiro Mori, Yokohama, JP;
Yasuyuki Fukashiro, Yokohama, JP;
Hideaki Tsushima, Komae, JP;
Yoshio Nogi, Fujisawa, JP;
Tomohiro Mori, Yokohama, JP;
Yasuyuki Fukashiro, Yokohama, JP;
Hideaki Tsushima, Komae, JP;
Hitachi Communications Technologies, Ltd., Tokyo, JP;
Abstract
Disclosed is an optical cross connect apparatus that is applicable to an end office node and relay node in a path. The optical cross connect apparatus includes an optical switch for generating plural optical output signals from plural optical input signals; an optical level monitor section for detecting the optical levels of the optical input signals; and a control section that is connected to the optical switch and the optical level monitor section, includes a path switching management section for retaining a path switching management table, references the path switching management table when the optical input signals detected by the optical level monitor section are found to be OFF, and judges whether the optical switch should be operated.