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:
May. 19, 1987
Filed:
Nov. 14, 1983
William R Goodman, Palo Alto, CA (US);
Tandem Computers Incorporated, Cupertino, CA (US);
Abstract
The disclosure relates to an input-output multiplexer demultiplexer communication channel which transfers data between a communications controller and a multiplicity of radially attached communications ports. Self-clocking serial bit-synchronous data is transferred on two opposing unidirectional data links between the communications controller and the communications channel. Serial bit-synchronous data is transferred between the communications channel and the communications ports. The communications channel uses one-bit-time response round-robin polling when the communications channel initiates transmissions from the communications ports. Data transmissions from the communications controller are multiplexed on-the-fly in the communications channel to one of the communications ports.