Optical communications – Fault recovery – Bypass inoperative element
Reexamination Certificate
2005-07-20
2008-11-04
Singh, Dalzid (Department: 2613)
Optical communications
Fault recovery
Bypass inoperative element
C398S015000, C398S017000, C398S033000, C398S050000
Reexamination Certificate
active
07447430
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.
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Shoichiro Seno, “Optical Cross Connect Technology for All-Optical Network”, PIL Workshop, published Feb. 19, 2003 by Mitsubishi Electric Corp.
Fukashiro Yasuyuki
Mori Tomohiro
Nogi Yoshio
Tsushima Hideaki
Antonelli, Terry, Stout & Kraus, L.L.P.
Hitachi Communications Technologies, Ltd.
Singh Dalzid
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