Because of this electronic incompatibility, whenever data are transmitted between a computer and a remote terminal, they must be converted from pulse form to wave form, and back again.

• 由于这种电子信号的不兼容性，无论何时当数据在计算机和远程终端之间传输时，它们必须从脉冲形式转换成连续波形式，并且还要转换回来。