pam 4d4D-PAM5 is the method used to transmit data at 1 Gbsec over four wire pairs using five snaling levels. It combines 8B1Q4, Trellis, Viterbi, and 4D coding and decoding, and isPAM 4D. LOGIN PAM4D. ALTERNATIF PAM4D. Share link. close button. ?member=alternatif&utm_medium=social&utm_source=.