The research and development of this product mainly concerns software including the porting of OS, Bluetooth stack and network configuration and application of SIP.
产品的开发主要围绕软件包括操作系统的移植，蓝牙协议栈的移植，网络平台的构建和SIP运用的开发。
The porting effort of such an OS is determined by the size of the OS kernel.
这种操作系统的移植难度大小只由系统内核的大小决定。
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