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:
Dec. 15, 1987
Filed:
Dec. 02, 1985
Joseph A Conforti, Phoenix, AZ (US);
GTE Communication Systems Corporation, Phoenix, AZ (US);
Abstract
Simplified CCIS (Common Channel Interoffice Signalling) data transfer circuitry is shown for transmitting data between a CCIS central processing unit of a central switching office and a number of terminal equipment controllers, each having a local CPU. The terminal equipment controller operates such equipment as modems of various speed, digital trunks or T1 spans. This design minimizes the amount of circuitry required to transmit CCIS data between central processing units, thereby permitting a more reliable design. This circuit provides a minimal amount of logic required for interprocessor communication. In addition, this circuit minimizes the amount of real time required by each CPU to perform the CCIS data transfer.