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:
Mar. 08, 2011
Filed:
Jul. 11, 2007
Applicants:
Noboru Yoshikane, Saitama, JP;
Takehiro Tsuritani, Saitama, JP;
Tomohiro Otani, Saitama, JP;
Inventors:
Assignee:
KDDI Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B 17/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A link connectivity verification message to recognize a physical link connection state is transmitted from the WDM to the PXC on a C-plane. The PXC transmits a link connectivity verification ACK message including information representing a physical link connection state, and the WDM transmits a cross-connect instruction message to cross-connect a transmission side and a reception side of a port (port) of the PXC. Probe light transmitted from the port (port a) of the WDM is turned back by a cross-connect of the port (port) of the PXC. The WDM receives the probe light to verify a link connectivity.