| 摘要 |
PURPOSE:To reduce a load on the processing of communication equipment monitoring facility by providing a circuit disconnection judging circuit, and prohibiting the output of the alarm signal of line disconnection from a receiver connected to the output of a common amplifier part by a prohibition signal from the judging circuit. CONSTITUTION:Response signals 10a and 10b from a switch 2 and alarm signals 11a and 11b from reception system common amplifier parts 3A and 3B are inputted to the circuit disconnection judging circuit 9. The circuit disconnection judging circuit 9 sends the prohibition signal to prohibit the sending of the alarm signal generating in the receivers 6A-6D connected to the output of the common amplifier parts to the outside when a fault occurs in the common amplifiers 3A and 3B and the switch 2 is operated to the receivers 6A-6D. Therefore, an inhibit circuit 8 in each of the receivers 6A-6D is operated by the prohibition signal, and the sending of the alarm signal to the communication equipment monitoring facility is prohibited. In such a way, it is possible to prevent an unrequired alarm signal from being sent to the communication equipment monitoring facility by generating line disconnection signals incidentally by a large number of receivers, and to reduce the load on the processing of the communication equipment monitoring facility. |
