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. 16, 1999
Filed:
Dec. 30, 1996
Sandeep A Patel, Cupertino, CA (US);
Claude G Hayek, Mountain View, CA (US);
3Com Corporation, Santa Clara, CA (US);
Abstract
A device interconnects across links, a plurality of terminals having respective modes of operation. The device includes a plurality of ports for connection to respective links, and logic coupled to the plurality of ports to exercise an auto-negotiation protocol with terminals coupled to the respective links to resolve modes of operation. The logic includes a shared unit for executing the auto-negotiation protocol, and an arbiter unit for arbitrating among the plurality of ports for use of the shared unit. The arbiter connects ports in the plurality of ports to the shared unit in a round robin sequence. Memory stores a set of status signals for respective ports. The arbiter logic polls the memory to read the set of status signals in sequence, and in response enables use of the shared auto-negotiation unit by the ports. The modes of operation resolved by the shared auto-negotiation unit include LAN technology supported by terminals on the corresponding links, such as IEEE 802.3 Local Area Network technologies.