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:
Oct. 21, 2008
Filed:
Sep. 15, 2004
Peter David Goldman, Boulder, CO (US);
Matthew Duane Mcshea, Westminster, CO (US);
Peter David Goldman, Boulder, CO (US);
Matthew Duane McShea, Westminster, CO (US);
Avaya Inc., Basking Ridge, NJ (US);
Abstract
The present invention is directed to the synchronization of clock frequencies across packet data networks. In particular, one or more communication endpoints may produce a clock signal that is synchronized to a master clock source. Synchronization is performed by providing timing packets containing information regarding a number of clock cycles counted on the master clock source to a controlled clock source. The controlled clock source uses the provided count to increment a counter value. At the same time, the counter value on the controlled clock source is decremented by the controlled clock source clock. The resulting counter value is used to address a correction table. A correction value from the correction table is applied to the frequency control input of the controlled clock source clock.