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:
Mar. 28, 1989
Filed:
Mar. 09, 1987
Milo Orsic, Lincolnwood, IL (US);
American Telephone and Telegraph Company, AT&T Bell Laboratories, Murray Hill, NJ (US);
Abstract
A switching arrangement comprising a crossbar array of crosspoint elements where each column of crosspoint elements, is associated with its own control ring mechanism. The enabling of the individual crosspoint elements of a column and the subsequent transmission of packets are effected rapidly in response to a token, e.g., a single enable bit, that is circulated on the associated control ring. Contention delays between packets are eliminated by passing the token during, rather than after, packet transmission. Upon receipt of a token bit at a crosspoint element, the crosspoint element is enabled while concurrently the token is passed to the next crosspoint element.