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:
Sep. 17, 2002
Filed:
Jan. 13, 1999
David B. Upham, Sunnyvale, CA (US);
Augustus Elmer, San Jose, CA (US);
Laurence J. Newell, Saratoga, CA (US);
David A. Pechner, San Jose, CA (US);
Abraham Kou, San Jose, CA (US);
Michael W. Rowan, Los Gatos, CA (US);
James F. Coward, La Honda, CA (US);
Norman L. Swenson, Fremont, CA (US);
Minnie Ho, Palo Alto, CA (US);
Kestrel Solutions, Inc., Mountain View, CA (US);
Abstract
A frequency division multiplexing (FDM) node used in optical communications networks provides add-drop multiplexing (ADM) functionality between optical high-speed channels, and low-speed tributaries. The FDM node includes a high-speed system and an ADM crosspoint. The high-speed system converts between an optical high-speed channel and its constituent electrical, low-speed channels through the use of frequency division multiplexing. The ADM crosspoint couples any incoming low-speed channels and any incoming tributaries to any outgoing low-speed channels and tributaries, thus implementing the ADM functionality for the FDM node.