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:
Mar. 24, 2009
Filed:
May. 23, 2007
Timothy J. Vitanza, Mars, PA (US);
Rebecca Webb Ross, Apollo, PA (US);
Regis J. Nero, Jr., Export, PA (US);
Timothy J. Vitanza, Mars, PA (US);
Rebecca Webb Ross, Apollo, PA (US);
Regis J. Nero, Jr., Export, PA (US);
Tollgrade Communications, Inc., Wilmington, DE (US);
Abstract
A system for determining insertion loss of a telephone line under test (LUT) is responsive to electrical stimulation of an input of the LUT at each frequency of a first plurality of discrete frequencies for determining values of at least two of Rs, Cs, Rp and Cp at each frequency, wherein Rs and Cs represent an equivalent series RC input impedance of the LUT and Rp and Cp represent an equivalent parallel RC input impedance of the LUT. The system determines an insertion loss value of the LUT as a function of a value of one of Rs, Cs, Rp and Cp determined at one frequency of the first plurality of frequencies and a value of another one of Rs, Cs, Rp and Cp at another frequency of the first plurality of frequencies.