Carrierless Amplitude Phase: a multilevel multiphase encoding method and one of the two main modulation methods that can be used with ADSL technology. CAP uses frequency modulation techniques for sending signals over standard copper twisted-copper wire, giving data bit combinations a form of both amplitude and phase. Unlike DMT, CAP uses the whole frequency range from 4KHz up to 1.1MHz as a single channel. It is used in the V.32/V.32bis modem communication standard.
