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:
Oct. 30, 1990
Filed:
Sep. 15, 1988
Harry J Dyke, Oak Forest, IL (US);
Dev R Rattan, Chicago, IL (US);
Rockwell International Corporation, El Segundo, CA (US);
Abstract
Digital loop carrier system having CPU to channel unit protocol. A method of communicating with the protocol is used in a telecommunication system having at least a central processing unit (CPU) connected to a plurality of digital interface units (DIU) via a communication module (CM). Each of the digital interface units is connected to a plurality of channel units (CU). The method has the steps of: sending from the CPU to the COM a command message having at least a first DIU address of a selected DIU of the plurality of DIU's, a channel address of a selected CU of the plurality of CU's, a second DIU address, the second DIU address being substantially identical to the first DIU address, and a first information portion; sending substantially the command message from the COM to the plurality of DIU's, the selected DIU receiving the command message; and in the selected DIU removing the first DIU address from the command message to form a modified message, and sending the modified message from the selected DIU to the plurality of CU's, the selected CU receiving the modified message. The selected module provides a response message to the CPU. The protocol provides a comprehensive response format which identifies the responding module, type of response, and if in error, who detected the error and type of error detected.