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:
Nov. 07, 2000
Filed:
Aug. 25, 1997
Applicant:
Inventors:
Mauricio Peres, Kanata, CA;
Hojjat Salemi, Nepean, CA;
Assignee:
Mitel Corporation, Kanata, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04J / ; H04L / ; H04L / ;
U.S. Cl.
CPC ...
370516 ; 370395 ; 375362 ; 375376 ;
Abstract
A method of generating timing signals for constant bit rate data received over an asynchronous data network carrying, comprises recovering clock signals from at least two separate sources, selecting one of the sources to drive a phase-locked loop generating a high speed output signal locked to the selected source, dividing the high speed output signal to provide the required timing signals for said constant bit rate data, and continually monitoring the selected source. In the event of failure of the selected source, the phase-locked loop is allowed to free run in a hold-over mode while it is switched over to the other source.