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:
Aug. 14, 1984
Filed:
Jun. 11, 1982
Applicant:
Inventor:
Gary Southard, Coral Springs, FL (US);
Assignee:
Siemens Corporation, Iselin, NJ (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ; H04M / ;
U.S. Cl.
CPC ...
371-9 ; 179 / ;
Abstract
An electronic system, such as a telephone exchange, including at least two, redundant computers. One computer is operated in the active mode while one or more are maintained in a hot 'standby mode' in readiness to take over the tasks of the active computer if this computer should fail. At least one 'cross channel circuit' is provided for updating the memory of the standby computer(s) in accordance with changes made in the contents of the memory of the active computer. The cross channel circuit changes the contents of the memory of the standby computer only at addresses which are within a prescribed, contiguous range of addresses.