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:
Dec. 28, 2010
Filed:
Apr. 30, 2008
Neil Haley, Hudson, MA (US);
Paul Curtis, Sudbury, MA (US);
Michael T. Ferrari, Shrewsbury, MA (US);
Neil Haley, Hudson, MA (US);
Paul Curtis, Sudbury, MA (US);
Michael T. Ferrari, Shrewsbury, MA (US);
Egenera, Inc., Marlboro, MA (US);
Abstract
A system, method, and adapter for creating fault-tolerant communication busses from standard components, are described. Fault-tolerant interface logic is provided for transmitting and receiving system health and system management signals to and from a module that is designed to be connected to a single RS-485 bus. The fault-tolerant interface logic enables the module to selectively communicate via at least two redundant half-duplex, multipoint, differential RS-485 busses. The fault-tolerant interface logic includes a first RS-485 transceiver connected to a first RS-485 bus, a second RS-485 transceiver connected to a second RS-485 bus, selector logic responsive to a control signal for selecting one of the first and the second busses to receive signals from and for transmitting the received signals to the module, and software logic executable on a baseboard management controller (BMC) chip. The software logic includes control logic for monitoring the health of the selected bus and for providing the control signal to the selector logic.