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. 17, 1984
Filed:
Apr. 29, 1982
Thomas E Ellis, Altamonte Springs, FL (US);
Pedro A Lenk, Fern Park, FL (US);
Jayantkumar R Shah, Longwood, FL (US);
Stromberg-Carlson Corporation, Lake Mary, FL (US);
Abstract
A central office telephone switching system including two interactive processors, including a call control processor that controls calls by establishing sequences of call progression states, and a port event processor that controls the ports and transmits and receives supervisory information to and from the ports. The port event processor and call control processor communicate through a port data store. The port event processor transfers the received supervisory information to the port data store, for use by the call control processor. The port event processor includes a digital filter that periodically time-samples the received supervisory information and determines the proper state of the received supervisory signal based on the states of the majority of the received sample signals.