Patent ID: 6567464
Filing Date: 2003-05-20
Classification: H04L

Abstract:
A digital modem for coupling to a transmission medium, comprising:communication logic that sends and receives information via the transmission medium; memory that stores a plurality of communication profiles; measurement logic, during initialization and in response to each of a new profile indication, that cooperates with the communication logic to measure the communication characteristics of the transmission medium and that generates and stores a corresponding communication profile into the memory; the measurement logic cooperating with the communication logic to transmit each of the plurality of communication profiles via the transmission medium when generated; monitor logic, coupled to the communication logic, that continuously monitors communication by the communication logic on the transmission medium according to any one of the plurality of communication profiles and that provides a signal change indication if the communication characteristics change by at least a predetermined amount; fast retrain logic, that selects another of the plurality of communication profiles stored in the memory in response to the signal change indication, that retrains the communication logic to operate according to the selected communication profile and that cooperates with the communication logic to transmit a fast retrain indication via the transmission medium identifying the selected communication profile; and the fast retrain logic, if not finding a suitable communication profile in the memory, providing a new profile indication to the measurement logic.