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:
Jul. 16, 1996
Filed:
Mar. 16, 1995
Michael W Patrick, Assonet, MA (US);
James A Daly, Chelsea, MA (US);
Digital Equipment Corporation, Maynard, MA (US);
Abstract
An apparatus is provided for detecting the signaling frequency of communications signals transported on the trunk and lobe circuits of a token ring. The communications signals including Differentially Manchester Encoded data signals. The apparatus includes an internal trunk circuit and a plurality of ports including an input port for connecting to an input trunk segment, and an output port for connecting to an output trunk segment, and a plurality of lobe ports for connecting to the lobe circuits. Means are provided for sensing the frequency of the data signals at each of said plurality of ports. The sensing means including means for taking multiple successive timing samples, and grouping the samples into quality groups.