COMMUNICATION METHOD, COMMUNICATION SYSTEM AND COMMUNICATION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a communication method, communication system, and communication device that achieve full duplex communication on one transmission path.SOLUTION: In order to achieve full duplex communication, signals accepted at transmission data terminals TX2, TX3 are converted into positive and negative pulse signals, added by adders 26, 36, and transmitted to a twisted pair cable 1. Determination and demodulation units 28, 38 determine at the same time whether or not a communication state on the twisted pair cable 1 is a state in which transmission data signals and reception data signals are in the same state, and output the result. EX-OR circuits 23, 33 demodulate the transmission data signals as the reception data signals by duplicating or inverting the transmission data signals on the basis of the determination result, and output the signals to reception data terminals RX2, RX3.