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. 24, 2012
Filed:
Apr. 14, 2009
Kapil Shrikhande, Berkeley, CA (US);
Ganesh Krishnamurthi, Danville, CA (US);
Raghvendra G. Savoor, Walnut Creek, CA (US);
Kapil Shrikhande, Berkeley, CA (US);
Ganesh Krishnamurthi, Danville, CA (US);
Raghvendra G. Savoor, Walnut Creek, CA (US);
AT&T Intellectual Property I, L.P., Atlanta, GA (US);
Abstract
A system and method is described for determining a condition of a communication line, such as the absence of a filter device on a digital subscriber line (DSL). A first signal characterized by a high upstream power is activated over the line, and a first set of parameters associated with the communication line is obtained. A second signal characterized by a low upstream power is activated, and a second set of parameters associated with the communication line is obtained. Comparison of first and second sets of parameters is indicative of a condition of the connection and presences or absence of a DSL filter on the communication line.