分组数据网络 meaning in Chinese

packet data networks

As requirement changes and technology progresses in telecommunication , the traditional pcm has more drawbacks . at the same time , packet switched data networks has grown significantly in quality of service . ip telephone is pretty promising due to its advantages , such as using statistical multiplexing , high resource usage , flexible bandwidth , multi - user calling , voice and data mixing and so on
传统的电话随着通信业务需求的变化和技术进步，其不足之处日渐突出起来，而与此同时，分组数据网络在网络经济中和业务质量控制方面取得了巨大的进步和发展。