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:
Jan. 21, 1992
Filed:
Mar. 30, 1990
David A Gaulke, Westminster, CO (US);
Thomas M O'Dell, Longmont, CO (US);
Ricky L Overmyer, Golden, CO (US);
AT&T Bell Laboratories, Murray Hill, NJ (US);
Abstract
An arrangement that enables an adjunct processor to determine the service status of switching system communication ports to which the adjunct processor is connected, without reliance on switch-to-adjunct status-conveying messages. In-service and idle ones of the ports participate in calls on a rotating basis. Following receipt of N calls, where N is the number of in-service ports connected to the adjunct processor, the arrangement determines whether each port that is presently designated as being in-service and idle has participated in one communication before a port has participated in a second communication. The arrangement then treats as out-of-service any port presently designated as being in-service that has been so determined a predetermined number of sequential times. It also selectively designates as in-service ports that have participated in communications since the last determination had been made.