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    • 3. 发明申请
    • Apparatus and method for CNG detection with call waiting
    • CNG检测与呼叫等待的装置及方法
    • US20050271197A1
    • 2005-12-08
    • US10860211
    • 2004-06-03
    • William McClureGary SmockCharles Copeland
    • William McClureGary SmockCharles Copeland
    • H04M1/82H04M3/20H04M3/22H04M3/42H04M11/00H04M11/06H04N1/327
    • H04N1/32708H04M1/82H04M3/20H04M3/2272H04M11/064H04M2203/2066H04N1/32704H04N1/32713H04N1/32719H04N1/32726H04N1/32734H04N1/32741H04N1/32745
    • A telephone switching device which includes a detector for identifying a call waiting (CW) signal when the incoming telephone line is in use. The detector device automatically switches the incoming telephone line to the second call and monitors for additional coded function signals such as a facsimile machine calling (CNG) signal indicating that a data transmission is desired. Appropriate switching functions are provided to connect attached telephony data devices for receiving the incoming data transmission. A microprocessor is used for receiving various function signals and performing the switching of the telephone line and attached apparatus. This allows the reception of an incoming data transmission on a single telephone line while the line is already in use. A voice message can be provided before the switching of the telephone line in response to the CW signal warning the first caller of the impending switch. Provisions are included for verifying incoming function signals and time delay sequences are incorporated for the attached data apparatus to be initiated and receive the incoming data transmission.
    • 一种电话交换设备,其包括用于在输入电话线路正在使用时识别呼叫等待(CW)信号的检测器。 检测器设备自动将输入电话线切换到第二呼叫,并监视附加的编码功能信号,例如传真机呼叫(CNG)信号,指示需要数据传输。 提供适当的切换功能以连接附接的电话数据设备以接收传入的数据传输。 微处理器用于接收各种功能信号,并执行电话线和连接设备的切换。 这允许在线路已经在使用时在单个电话线上接收输入数据传输。 响应于CW信号警告即将到来的交换机的第一呼叫者,可以在切换电话线之前提供话音消息。 包括用于验证进入功能信号的规定,并且并入时间延迟序列用于要启动的附加数据装置,并接收传入数据传输。