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ATM交换和IP功能的综合业务交换平台。
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ATM交换和IP功能的综合业务交换平台。
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