Patent ID: 7573943
Filing Date: 2009-08-11
Classification: H04B,H04L,H04M

Abstract:
1. A system comprising: a customer premises equipment (CPE) DSL modem coupled to a pedestal via a first active twisted pair telephone DSL line (“first line”) to receive DSL data signals from the pedestal, the CPE DSL modem further coupled to the pedestal via a second inactive twisted pair telephone line (“second line”), wherein the first line and the second line are both part of a single drop segment coupling the CPE DSL modem to the pedestal; an interference collector coupled to the CPE DSL modem and to the second line to collect interference data from the second line related to interference noise carried by the second line in a frequency range used to carry the DSL data signals on the first line; an interference canceller coupled to the interference collector, the CPE DSL modem and the first line to subtract from the first line the interference data collected from the second line and thereby remove at least a portion of the interference noise from the first line.