| 摘要 |
PURPOSE:To attain excellent ordering communication by providing a bypass circuit for an ordering signal between power supply terminals of a power supply section so as to reduce considerably the attenuation of the power supply section to the optical repeater in applying ordering communication through a feeder of a feeder incorporating optical cable. CONSTITUTION:A bypass circuit 8 comprising a capacitor 9 and a choke coil 10 is provided between power supply terminals N1, N2 of a power supply section 5 in the optical relay system to constitute the power supply circuit 20 for the optical repeater 1. The bypass circuit 8 shows a high impedance to a noise generated in the power supply section 5 and other noise and represents a low impedance to the ordering signal. The ordering signal sent from an ordering signal device 12 is sent via a feeder 4 and the circuit 20, since the bypass circuit 8 is provided to the circuit 20, the ordering signal is sent without being attenuated in the circuit 20. |
