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:
Nov. 06, 2001
Filed:
Feb. 28, 2000
Applicant:
Inventor:
Todd A. Pett, Longmont, CO (US);
Assignee:
Qwest Communications International Inc., Denver, CO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M 7/04 ; H04M 9/00 ;
U.S. Cl.
CPC ...
H04M 7/04 ; H04M 9/00 ;
Abstract
Subscriber loop systems often contain bridged taps which may interfere with the transmission of DSL signals. The bridged tap creates at least one local minimum at a notch frequency in the frequency response of the subscriber loop within the frequency range of the DSL signals. Effects of the bridged tap on a subscriber loop are reduced by terminating the bridged tap with a bridged tap canceller. The bridged tap canceller has at least one filter element for each local minimum created by the bridged tap. Each filter element provides substantially complete reflection of DSL signals at the corresponding notch frequency.