铁通基于NGN一机双网实现铁路专网业务的技术探讨

摘要

铁通PSTN的未来演进方向是IMS，现阶段在演进条件尚不具备的条件下，需要基于NGN一机双网作为过渡方式为铁通公专网用户提供业务。本文探讨了专网用户迁入NGN的场景、方式，以及NGN一机双网的技术方案，并进行了安全性分析。%The PSTN of China Tietong is in the evolu-tion towards IMS. During the transition period, the NGN-based equipment is needed to serve both the public network and the private network. This paper discusses the network scenes of private users' migra-tion to NGN, and technique solutions for NGN to serve dual networks, and analyzes the security issue.