A novel benzamide derivative represented by the following general formula: . A plurality of circuit board units are prepared and formed with patterned circuit layers thereon. The transmitter then stores these communication parameters and when transmitting to that particular receiver, the transmitter utilizes the stored parameters in an effort to maximize the data rate to that receiver. The method further comprising detecting at least one aliased tap in a time domain channel response of the second zone using the two or more first delay profiles.