Method and system for transmitting and receiving data based on ethernet

It discloses an Ethernet-based data transmission and reception system. According to the example an aspect of this embodiment, the first media access control (MAC) layer, and a second media access control (MAC) layer, and a first media access the data input signal from the control layer through the TCM (Trellis Coded Modulation) of the two-dimensional pulse amplitude modulation a first physical layer for converting a signal, is connected to the first physical layer and the Ethernet (ethernet) through the UTP cable of the second pair, demodulates the pulse amplitude modulation signal of the two-dimensional received from the first physical layer second media a second physical layer to output to the MAC layer.