The HDLC Protocol Controller can be used as a D-channel interface in a digital line card comprised of multiple DNICs.

HDLC协议控制芯片也可以作为D通道接口，用在包含多个DNIC的数字线路卡上；

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Product Mechanical Dimensions, external electrical signal, communication bus protocol and the standard memory card line, and currently on the market with memory card interface device is compatible.

产品机械尺寸、外部电气信号、通讯总线协议与标准的存储卡保持一致，与目前市场上的带有存储卡接口的终端设备兼容。

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SD card reader and configure the USB interface, user can pass throw in audio line will be it with computers, music, play device to connect.

配置了SD读卡器及USB接口，用户可以通过附赠的音频线将它与电脑等设备连接，播放音乐。

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