PSTN向NGN演进过程的分析

Analysis on Developing Process from PSTN to NGN

随着交换网络的发展,NGN逐步成为交换网发展的必然方向,但PSTN仍然是当前的立身之本,传统话音依然是目前电信运营商最主要的业务收入来源,而且向NGN过度也将是一个较长的过程。文中首先介绍了PSTN网的特点及面临的问题,然后描述了传统PSTN网向基于分组交换的NGN网演进的目标和方案,最后对NGN网络也进行了深入的分析,并阐述了从PSTN网络智能化改造向NGN的演进的过程。

With the development of switch network, NGN （Next Generation Network） is becoming one of the key techniques. However, PSTN is still the fundamental technique, and the traditinal phone still the main income source of the telecom operator. This paper first presents the characteristics and problems of PSTN network, and then describes the targets and projects of the development form traditional PSTN network to packet switch-based NGN. Finally, this paper analyzes NGN network detailedly, and discusses the process of development from intelligentized PSTN network to NGN.