Newton Serial DCE PC Cable (part # 590-0964): 6 7 8 3 4 5 8-pin DIN connector 1 2 pin-out ---------------------------------------------------- Cable 8-pin DIN end 9-Way D-Type female DCE end 1 --------->---------- 1,6 DTR 2,7 ---------<---------- 4 DSR 3 --------->---------- 2 Tx 4,8 -------------------- 5 ground 5 ---------<---------- 3 Rx 6 not used ---- 7 | looped ---- 8 --------------------------------------------------- Modified serial-cable: 4 -------------------- 5 ground 8 --------| |--------- 5 ground capacitor e.g. 47nF