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    • 5. 发明授权
    • Call detection control apparatus
    • 呼叫检测控制装置
    • US5416832A
    • 1995-05-16
    • US71777
    • 1993-06-04
    • Toshio NittaToshikatsu KobayashiTakeshi SasakiTooru Ikeda
    • Toshio NittaToshikatsu KobayashiTakeshi SasakiTooru Ikeda
    • H04M3/00H04M3/22
    • H04M3/2272H04M3/005
    • A call detection control apparatus includes individual call detecting circuits, a common call detecting circuit, switching circuits, and a power supply circuit. The individual call detecting circuits individually detect call signals, which originate from telephone subscriber lines. The common call detecting circuit commonly detects call signals, which originate from the respective telephone subscriber lines. The switching circuits switch the respective telephone subscriber lines from the common call detecting circuit to the respective individual call detecting circuit when the common call detecting circuit detects an call signal from one of the respective telephone subscriber lines. The power supply circuit supplies operating power to each of the individual call detecting circuits upon interlocking with an operation of a corresponding one of the switching circuits.
    • 呼叫检测控制装置包括单独的呼叫检测电路,公共呼叫检测电路,开关电路和电源电路。 各个呼叫检测电路分别检测来自电话用户线路的呼叫信号。 公共呼叫检测电路通常检测来自各个电话用户线路的呼叫信号。 当公共呼叫检测电路从相应的电话用户线路中的一个检测到呼叫信号时,切换电路将各个电话用户线路从公共呼叫检测电路切换到相应的各个呼叫检测电路。 当与相应的一个开关电路的操作互锁时,电源电路向各个呼叫检测电路提供工作电力。