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    • 6. 发明授权
    • Protection against overvoltages of an interface of telephone lines
    • 保护电话线接口的过电压
    • US06172864B2
    • 2001-01-09
    • US08816771
    • 1997-03-18
    • Andr{acute over (e)} BremondPhilippe Merceron
    • Andr{acute over (e)} BremondPhilippe Merceron
    • H02H100
    • H04M3/18
    • The present invention relates to a system for protecting against overloads in a telephone system. The telephone system includes a telephone exchange, a ringing device and an interface, coupled to receive input signals on subscriber lines. The input signals are forwarded to either the telephone exchange or the ringing device depending upon the operating mode of the telephone system. The telephone line supplies a signal indicating the operating mode. A single protection device is coupled between the input of the subscriber lines and the interface. The protection device is controlled by the operating mode signal, and includes logic for protecting both the ringing device and the telephone exchange.
    • 本发明涉及一种用于防止电话系统中的过载的系统。 电话系统包括电话交换机,振铃设备和接口,被耦合以在用户线路上接收输入信号。 根据电话系统的操作模式,输入信号被转发到电话交换机或振铃设备。 电话线提供指示操作模式的信号。 单个保护设备耦合在用户线路的输入端和接口之间。 保护装置由操作模式信号控制,并且包括用于保护振铃装置和电话交换机的逻辑。