Patent ID: 6765989
Filing Date: 2004-07-20
Classification: H04L

Abstract:
A method for reducing noise from a telephone in a splitterless Asymmetric Digital Subscriber Line modem in order to optimize downstream data transfer to the modem, wherein the telephone and the modem share a telephone loop, the method comprising the steps of:ascertaining a first noise characteristic for the telephone loop when the telephone is on-hook, wherein the first noise characteristic is measured by the modem; measuring a second noise characteristic for the telephone loop when the telephone is off-hook, wherein the second noise characteristic is measured by the modem; determining whether the first noise characteristic is less than the second noise characteristic; and when the first noise characteristic is less than the second noise characteristic, incrementally decreasing transmitted power from the modem by an amount equal to a power cutback value until a current noise characteristic for the telephone loop is less than a predetermined level.