To adapt to the broadband and packetized network development trend, the digital SPG switching paradigm in PSTN should be gradually evolved to a combined ATM and IP service switching platform.
为了适应网络宽带化、分组化的发展趋势，PSTN中的数字程控交换要逐步演进为包含A TM交换和IP功能的综合业务交换平台。
The telephone network based on circuit-switching and digital program controlled exchanging technology plays an important role in the whole communicating networks.
以电路交换和数字程控交换技术为基础的电话网更是在整个通信网中占据着重要的地位。
The important role of the digital analysis platform for water distribution network in the switching from old water source to new water source and the optimized dispatching was described.
阐述了配水管网数字分析平台在城市新老水源切换及优化调度中的重要作用。
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