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. 11, 2014
Filed:
Jul. 31, 2007
Applicants:
Maurizio Gazzola, Milan, IT;
Ronald Johnson, Petaluma, CA (US);
Lorenzo Ghioni, Tavazzano con Villavesco, IT;
Inventors:
Maurizio Gazzola, Milan, IT;
Ronald Johnson, Petaluma, CA (US);
Lorenzo Ghioni, Tavazzano con Villavesco, IT;
Assignee:
Cisco Technology, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04J 14/02 (2006.01); H04J 14/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A reconfigurable optical add/drop multiplexer (ROADM) with a multiplexer, demultiplexer, and a wavelength cross-connect unit provides directionless capabilities. The ROADM allows a signal not to be limited to a particular direction when added at an optical network node, for example. The signal can be sent to other directions of the optical network node. Furthermore, the ROADM allows the wavelengths of add and drop signals to be changed and hence is 'colorless.'