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:
Apr. 02, 2002
Filed:
Sep. 15, 1997
James R. Sisk, Cedar Park, TX (US);
John F. McHale, Austin, TX (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A digital subscriber line (xDSL) communication system ( ) is disclosed that allows xDSL communication across a local loop. The system ( ) includes a local loop termination point ( ) and customer premises equipment ( ) connected to a twisted pair telephone line ( ). Loop integrity test devices ( ) for xDSL communication are located at the local loop termination point ( ) and the customer premises equipment ( ) and are coupled to the telephone line ( ). The loop integrity test devices ( ) are respectively operable to transmit test signatures across the telephone line ( ), to receive and evaluate test signatures from the telephone line ( ), and to indicate whether the telephone line ( ) can support xDSL communication based upon evaluation of test signatures.