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市场与技术的发展变化使得电信运营商陷入两难的困境：一方面，数据业务流量正逐步超越语音并将成为未来网络的主导业务；另一方面，目前超图１NGN参考模型接入层线缆Modem蜂窝移动无线接入数字环路承载者IP汇聚交换会聚３G技术DSLAMTMNIN计费中心业务运营业务层传送层边缘交换
Market and technology changes make telecom operators in a dilemma: On the one hand, data traffic is gradually beyond the voice and will become the dominant business of the future network; the other hand, the current hyperlink 1NGN reference model access layer cable Modem Cellular Mobile Radio Access Digital Loop Carriers IP Aggregation Exchange Convergence 3G Technology DSLAMTMNIN Billing Center Business Operations Business Layer Transport Layer Edge Switching