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:
Jul. 05, 1994
Filed:
Dec. 16, 1991
Thomas W Anderson, Naperville, IL (US);
Elliott Baral, Chicago, IL (US);
Ronald S Byrd, North Aurora, IL (US);
Bernard W Fecht, Naperville, IL (US);
David S Isenberg, Shrewsbury, NJ (US);
Larry W Kirsch, Bolingbrook, IL (US);
Frederick W Korty, Wheaton, IL (US);
Ronald B Martin, Wheaton, IL (US);
Dario L Parola, Matawan, NJ (US);
AT&T Bell Laboratories, Murray Hill, NJ (US);
Abstract
A network monitor and associated control system is provided to monitor a toll network for customer signaling. A multi-tone signal processor and associated control is provided such that when signaling is detected, such signaling is validated against a provisioned list. A valid signal is reported to a central control of the network switch, which takes action in response to the signal.