| 摘要 |
PURPOSE:To restrain the number of terminal modulator and demodulator (MODEM) and communication lines to one respectively, by providing a distributor, which analyzes address data, in a center and by adding address data to data and transmitting them from a terminal. CONSTITUTION:Transfer data is sent from a terminal 3 in a data format with address data of a designated processing device is added. In the side of a center 5, the analogue signal is converted to a digital signal by a MODEM 11 in a distributor 6, and bit information is converted to character data by a serial-parallel converting circuit 10 and character data is analyzed by a data analyzing circuit 9 to pick up address data. Transfer data passes through the circuit 9 as it is. Next, transfer data is transmitted to one of data transmitting and receiving circuits 71-7n, which corresponds to picked-up address data, by a collecting and distributing circuit 8. Thus, transfer data is processed in the designated processing circuit 8. Thus, transfer data is processed in the deisgnated processing device. Meanwhile, character data received from one of processing devices 11- 1n by circuits 71-7n becomes bit information through the circuit 8 by the circuit 10 and is transmitted to a line 2. |
