| 摘要 |
PURPOSE:To prevent the interference of data and malfunction due to noise by transmitting and receiving data by an electrooptic transducer, a photoelectric transducer and a data bus line. CONSTITUTION:When an incoming from a trunk line is given to a data receiving section 8, the incoming data is converted into an optical signal at the electrooptic transducer 9 and transmitted to a CPU section 10 via a data bus line 11. The photoelectric transducer 12 of the CPU section 10 converts the transmitted optical signal again into an electronic signal to process. The electric signal processed at the CPU section 10 is converted into an optical signal at the transducer 9 provided at the CPU section 10 and fed to each board through a data bus line 13. On the other hand, each board distinguishes the signal transmitted and received by itself among the optical signals passing through the bus lines 11 and 13 and transmits and receives it. Thus, accurate data correspondence is attained without transmitting and receiving data affected by external noise. |
