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:
Jun. 30, 2015
Filed:
Mar. 05, 2013
At&t Intellectual Property I, Lp, Atlanta, GA (US);
Chen-Yui Yang, Marlboro, NJ (US);
Paritosh Bajpay, Edison, NJ (US);
David H. Lu, Morganville, NJ (US);
Raghvendra Savoor, Walnut Creek, CA (US);
Anthony M. Srdar, Alpharetta, GA (US);
Jin Wang, Fremont, CA (US);
Xidong Wu, Livermore, CA (US);
Xiaochuan Yi, Danville, CA (US);
AT&T INTELLECTUAL PROPERTY I, LP, Atlanta, GA (US);
Abstract
A method of diagnosing a transmission loop in an Internet protocol television (IPTV) network includes configuring the loop as an open loop and performing a single-ended loop test (SELT), configuring the loop as a terminated-loop and performing another SELT, subtracting a trace of the first SELT from a trace of the second SELT, and determining the length of the loop from the result. A service assurance system in an IPTV network includes a test module and a DSLAM coupled to a residential gateway by a transmission loop. The test module operates to determine that a fault condition on the IPTV network is caused by a fault in the loop, direct the DSLAM to perform an open loop SELT and a terminated-loop SELT on the loop, receive the results of the SELTs, and determine a location of a tap on the loop based upon the results.