| 摘要 |
PURPOSE:To facilitate supervision of a remote station by decreasing a scale of an additional device without need of a private line or a private device. CONSTITUTION:A slave equipment 1 converts an equipment alarm signal of a radio relay terminal station 3 and an external alarm signal into a corresponding DTMF signal, sends the converted signal to the radio relay terminal station 3, from which the signal is sent to a radio relay terminal station 4 by using an order wire line in a radio zone. The radio relay terminal station 4 sends a received DTMF signal from the slave equipment 1 to a master equipment 2, the master equipment 2 decodes the DTMF signal to specify an alarm of the radio relay terminal station 3. The master equipment 2 converts a control signal into the corresponding DTMF signal and sends the converted signal to the radio relay terminal station 4, which provides an output to the radio relay terminal station 3 by using the order wire line. The radio relay terminal station 3 sends the received DTMF signal from the master equipment 2 to the slave equipment 1, which decodes the DTMF signal to provide an output of the control signal externally. |
