| 摘要 |
PURPOSE:To improve the utilization efficiency of a transmission line by converting a transmission electric signal from a time division direction control transmission part into the transmission signal of light, so as to transmit it to the optical line and converting the reception signal of light received from the optical line into a reception electric signal of light received from the optical line so as to transmit it to a time division direction control reception part. CONSTITUTION:Transmission data is inputted to the time division direction control transmission part 13 from a transmission data input terminal 15 and converted into the transmission part 13. The transmission signal is converted into the transmission signal of light in an optical coupler 11 and transmitted to the optical line 12. On the other hand, the reception signal of light received from the optical line 12 is converted into the reception signal in the optical coupler 11. The reception signal is converted into reception data in the time division direction control reception part 14 and outputted from a reception data output terminal 16. Consequently, a creeping signal by a leakage from the time division direction control transmission part 13 to the time division direction control reception part 14 is reduced. Thus, time interval between the transmission signal and the reception signal can be reduced compared with a conventional case, and the utilization efficiency of the transmission line can be improved. |
