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:
Jan. 27, 2004
Filed:
Mar. 18, 1999
International Business Machines Corporation, Armonk, NY (US);
Abstract
A system for checking the integrity of data transfer in a switching element in a high speed packet switching network node where multicasting is performed by simultaneously shifting data from a first shift register into the targeted device shift registers. The outputs of the device registers are fed back into the first shift register. The checking system includes a device select circuit for selecting the targeted via a set of select lines and a negative OR gate circuit. The select line signals and the first register output are inputs to the OR gate, the output of which is fed back to the first register. A comparator circuit has inputs supplied by the device select lines and the outputs of the device registers. A processor compares the contents of the first register to the outputs from the logic comparator circuit to test whether the data has been properly multicast to the targeted.