Dynamic Adaptive Multi-Carrier Quadrature Amplitude Modulation (DAM-QAM) is a dynamic transmission method for modems
. With DAM-QAM modulation, the line signal consists of a large number of frequency-shifted carrier oscillations. DAM-QAM transmission is therefore also called multicarrier transmission. The advantage of the DAM-QAM method is that the QAM scheme can be adapted to the line quality.