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:
Feb. 27, 2007
Filed:
Feb. 24, 2003
Blaine Edward Ramey, Indianapolis, IN (US);
Brian Albert Wittman, Indianapolis, IN (US);
Blaine Edward Ramey, Indianapolis, IN (US);
Brian Albert Wittman, Indianapolis, IN (US);
Thomson Licensing, Boulogne - Billancourt, FR;
Abstract
A device and a method for detecting presence of service on a telephone line prior to and during activation of alternative service on the line. The method comprises performing a first voltage detection on a subscriber line (S), activating a subscriber line interface circuit (SLIC) if no pre-existing service is detected (S), the SLIC providing an interface between the subscriber line and a service provider, and performing a second voltage detection on the subscriber line after a usage-dependent time has elapsed (S), the time being determined by heuristics which consider several factors, including usage history of the line and time of day.