| The main trend of telecom network development is VoIP Next Generation Network based on packet soft-switching technology,which is the development of NGN.The flat network structure of NGN and IP architecture also make it the new trend of voice network development.But it has become the focus of the field on the network security problem and the way to evolve current massive PSTN exchange to NGN.This paper mainly discusses how to solve the security disaster tolerance problem in fixed network NGN and how to evolve the traditional telecommunication network smoothly into NGN through flexible usage of the Access Gateway(AG)technology.Firstly,this paper has launched detailed analysis on current development status of NGN technology.It narrates the basic concept of NGN network characters,network architecture and NGN protocols.Then this paper analyzes in details the main security disaster tolerance method of NGN-Dual Homing technology,which is applied to present network such as Alcatel Shanghai Bell and ZTE communication equipments.The existing Softswitch equipment contains a mass of allopatric disaster tolerance technology,AG is one of the main service targets.The purpose is to ensure the normal communication of AG equipments.However,to guarantee the AG equipment normal operation not only depends on SS,its own functional data accuracy is also the key point to guarantee its normal operation.This paper takes an example about Shanghai Telecommunication Fixed Network NGN,which is introduced into an advanced integrated access gateway(ISAM-V)product of Alcatel Shanghai Bell.It narrates the important position and function of NGN Access Gateway.And It also describes the position of AG equipment in network,Hardware configuration and the demand of the IP address,designs the ISAM-V test procedures, proposes feasible AG data functional testing method and trouble shooting programs.According to onsite tests,the solution of this paper is feasible. |
