| 摘要 |
In the present invention, a transmission base unit (base unit) and a plurality of communication terminals (extension units) are connected to a communication line (first communication line), the transmission base unit supplying drive power to the plurality of communication terminals via the communication line. The plurality of communication terminals perform, in synchronism with each other, transmission processing using an electric current signal (first signal) in only a communication period, and perform a state transition accompanying a fluctuation in drive power exceeding a prescribed width in only a load fluctuation period separate from the communication period. |
