| 摘要 |
PROBLEM TO BE SOLVED: To provide a data communication method and a data communication system that can attain high-speed data communication. SOLUTION: Each of slave communication units CS1 to CSn of the data communication system sequentially outputs data signals to a data communication line DL, by using a WAKE signal received from a ring line RL as a trigger, and a master communication unit BM receives the data signals by correlating them with each of the slave communication units CS1 to CSn. Thus, ID is no longer required for a signal sent/received through the data communication line DL. Furthermore, since the master communication unit BM has only to transmit a command signal to the data communication line DL to have all the slave communication units CS1 to CSn simultaneously receive the command signal and return a data signal in response to the command signal, the system can reduce the transmission reception quantity of data compared to that in the conventional system.
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