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:
Apr. 29, 2003
Filed:
Feb. 01, 1999
Applicant:
Inventor:
Emmanuel Desurvire, Bruy{overscore (e)}res le Ch{overscore (a)}tel, FR;
Assignee:
Alcatel, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04J 1/408 ;
U.S. Cl.
CPC ...
H04J 1/408 ;
Abstract
A method of detecting one or more free channels in a time-division multiplexed optical signal which may be used for insertion signals in switching nodes of optical communication networks. The method includes sampling successive optical pulses from at least one of said channels, measuring the average optical power of the sampled pulses during a predetermined time period, and generating a detection signal if said average optical power is less than or equal to a predetermined threshold value.