Kestrel Solutions, Inc.

Augustus Elmer

Minnie Ho

Norman L Swenson

James F Coward

Laurence J Newell

David Alan Pechner

Michael W Rowan

David B Upham

Abraham H Kou

Peter H Chang

Ting K Yee

Stuart E Wilson

A frequency division multiplexing (FDM) node used in optical communications networks provides add-drop multiplexing (ADM) functionality between optical high-speed channels and electrical low-speed channels. 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 and preferably also QAM modulation. The ADM crosspoint couples incoming low-speed channels to outgoing low-speed channels, thus implementing the ADM functionality for the FDM node.

Optical communications networks utilizing frequency division multiplexing

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.

Electrical add-drop multiplexing for optical communications networks utilizing frequency division multiplexing

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San Jose, CA, United States of America

Augustus Elmer