Patent ID: 6549568
Filing Date: 2003-04-15
Classification: H04L,H04W

Abstract:
A modem for use in a multipoint environment, the modem being coupled to a transmission medium, the modem comprising:a receiver which receives signals transmitted to the modem over the transmission medium, the receiver comprising an equalizer which generates tap signatures based on an off-hook condition of a telephone, the telephone being coupled to the transmission medium; a transmitter which transmits signals over the transmission medium; a memory device which stores tap signatures and transmit power levels, each transmit power level being associated with a particular tap signature; and a processor in communication with the receiver, the transmitter and the memory device, wherein when a telephone connected to the transmission medium goes off-hook, the receiver notifies the processor that the telephone has gone off-hook, and wherein the receiver delivers a tap signature associated with the off-hook condition to the processor, and wherein the processor compares the tap signature associated with the off-hook condition with at least one tap signature stored in the memory device in order to find a tap signature stored in the memory device which matches the tap signature delivered to the processor from the receiver, wherein when the processor determines that a match has occurred, the processor reads the transmit power level associated with the matching tap signature out of the memory device and sets the transmit power level of the transmitter to the transmit power level read out of the memory device.