The task of this research is to design a high speed data switch network which is used in a base station controller (BSC) of a digital mobile communication system based on CDMA technique.

本课题的任务是为采用CDMA技术的数字移动通信系统设计一个应用于基站控制器（BSC）内部的高速数据交换网络。

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The switch signal was encoded directly and one state was expressed with 3 long distance sequence code, then it was transmitted through the digital relay line of telecommunication network.

对开关信号进行直接编码，采用3个连续出现的大码距字节表示开关信号的一个状态，编码后的信号利用电信网的数字中继线路传输。

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Based on the structural analysis of digital substation network, the switch which supports the multicast protocol is proposed to avoid the broadcast transmission for multicast packets.

在分析数字化变电站网络结构的基础上，提出选用支持组播协议的交换机，以免组播报文以广播方式发送。

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If digital communications are disrupted, the site can switch to analogue technology with assistance from the Radio Amateurs' Emergency Network.

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