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:
Apr. 26, 1988
Filed:
Jul. 26, 1985
Ronald S Cassidy, Derry, NH (US);
John R Celli, Long Branch, NJ (US);
Kevin M Roselle, Hudson, NH (US);
American Telephone and Telegraph Company, Murray Hill, NJ (US);
AT&T Technologies Inc., Murray Hill, NJ (US);
Abstract
A high rate of exchange of information between a control station and each one of multiple associated stations in a key telephone system is economically achieved by using a multipurpose computer in each station to provide the UART function. Serial transmission of asynchronous data is full duplex for the control station and half duplex for ech associated station, with the control station polling a first station and then obtaining that station's response. While the first station is responding, the control station polls a second station and continues in this manner until all the associated stations are polled. The UART function also allows the computer to process other tasks during the same period of time that the serial transmission or reception of data is occurring.