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    • 10. 发明授权
    • Low cost ISDN switch
    • 低成本ISDN交换机
    • US5210741A
    • 1993-05-11
    • US546420
    • 1990-06-29
    • Robert J. Grochmal
    • Robert J. Grochmal
    • H04Q11/04
    • H04Q11/0471H04Q2213/003H04Q2213/103H04Q2213/109H04Q2213/25H04Q2213/299
    • A switch for selecting, from among a plurality of devices, a device to be coupled to a data line, such as an ISDN line. The switch includes a data line receiver coupled to a data line interrogator and switch controller. The switch further includes a device identifier coupled to both the data line receiver and the data line interrogator and switch controller, and a plurality of buffers which can be enabled by the device identifier, thus coupling a device, connected to one of such buffers, with the data line, also connected to such buffers. Information received by the data line receiver is passed to the data line interrogator and switch controller for evaluation to determine whether such information is device identification information. If such information is device identification information, the device interrogator and switch controller signals the device identifier to examine the data and enable the appropriate buffer associated with the device identified by such information so that the identified device can be operatively coupled to the data line. The switch also provides the required control logic to enable a device to be coupled to the data line for transmission of information thereon.
    • 用于从多个设备中选择要耦合到诸如ISDN线路的数据线的设备的开关。 该开关包括耦合到数据线询问器和开关控制器的数据线接收器。 该开关还包括耦合到数据线接收器和数据线询问器和开关控制器两者的设备标识符,以及可以由设备标识符启用的多个缓冲器,从而将连接到这种缓冲器之一的设备与 数据线也连接到这样的缓冲区。 由数据线接收器接收的信息被传递给数据线询问器和交换机控制器进行评估,以确定这样的信息是否是设备识别信息。 如果这样的信息是设备识别信息,则设备询问器和开关控制器用信号通知设备标识符来检查数据,并且启用与由这样的信息标识的设备相关联的适当的缓冲器,使得所识别的设备可以可操作地耦合到数据线。 交换机还提供所需的控制逻辑,以使设备能够耦合到数据线以便在其上传输信息。