| 摘要 |
PURPOSE:To transmit data on a line between prescribed stations by optical communication without changing the hardware and software of the stations and to make the mixing of data transmission possible by the signals of electric and optical systems, by applying optical communication to a multi-drop type transmission system. CONSTITUTION:A signal from another station is received by an optical receiver 21 and transmitted to one station through gates 43, 45, 44 and an electric system driver 13. The signal from the station is transmitted to another optical bus through an electric system receiver 12, gates 41, 45, 42 and a transmitter 22 to communicate with another transmitter. A first arrival discriminating circuit 30 discriminates which receiver out of the optical receiver 21 and the electric system receiver 12 has received the signal first and controls the gates 41-44 to set up a faster transmission course. |
