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:
Dec. 07, 2004
Filed:
May. 30, 2000
Michael A. Issaa, San Bruno, CA (US);
Steven Chow, San Carlos, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A filtering device ( ) for active filtering at a customer premises includes an input interface that receives telephone signals and digital data signals communicated from a central office ( ) using a telephone line ( ). The filtering device ( ) further includes an active low-pass filter ( ) that receives the telephone signals, the digital data signals, and electrical power from a power source. The active low-pass filter ( ) attenuates the digital data signals and passes the telephone signals using the electrical power. The filtering device ( ) also includes an output interface that receives the telephone signals from the active low-pass filter ( ) and communicates the telephone signals to a telephone ( ).