Altera Corporation

Nortel Networks Corporation

Pts Corporation

Kyle Edginton

Ross Saunders

Marc A Nadeau

James Moser

Ketan Bhalla

Gamal Refai-Ahmed

Lee Shyue Choong

Andre Lortie

Simon E Shearman

Geoffrey G Skanes

Denis Kasprowicz

A field reconfigurable muxponder for use in an optical transport system. The muxponder includes one or more tributary cards, where each tributary card is adapted to receive an optical data signal and conditions the optical data signal into an intermediate data signal constituted in accordance with a tributary interface format. In this way, the muxponder is able to aggregate optical data signals having different protocols and/or different data rates. The muxponder further includes a chassis that is adapted to receive a predefined number of tributary cards and outputs an optical system signal independently from the availability of the optical data signals from the tributary cards. The tributary cards and the chassis integrally form one line card.

Field reconfigurable line cards for an optical transport system

A printed circuit board having a plurality of spaced apart scrap border support tabs along the perimeter. The board surfaces including the edges are coated with a conductive shielding material, except that each tab presents an uncoated, unshielded surface at the point of severance created by detachment of a scrap border subsequent to the coating application. The printed circuit board includes a plurality of spaced apart elongated apertures adjacent the perimeter, with each aperture being inwardly coincident to a respective one of each support tabs, each aperture defining an inner surface adjacent to the corresponding support tab with a portion of the inner surface being substantially parallel to adjacent perimeter portions of the circuit board, the inner surface of each aperture also being coated with the conductive shielding material with the latter being attached to the conductive shielding material of the board surface. A waveguide configuration is created which serves to attenuate electromagnetic emissions entering into or leaving the printed control board at the corresponding uncoated unshielded surface portions of the support tab during use of the printed circuit board. Frequencies in excess of 40 gigahertz may be attenuated.

Printed circuit board having a plurality of spaced apart scrap border support tabs

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Nepean, Canada

Kyle Edginton