The Application Of Soft Switch Technology In The Design Of Voice Transmission System

With the rapid development of modern communication technology,communication system has not only provided the basis of voice communication service.Telecommunication industry is fully integrated with the network field,thus it promotes the development of the telecommunication industry more quickly.With the continuous development of network technology,the network system is evolving in the direction of continuous integration.The concept of the next generation network appears.As a functional entity,the soft switch provides the call control and connection control function for the next generation network,which is the core of the next generation network call and control.Soft switch is one of the key technologies that can be combined with voice communication,multimedia services and data interaction.By the technology that can achieve the control of business and bearer separation,the soft switch achieves control of the entity.And in the whole system,it not only completes the signaling protocol connection and control function to play a central role,but also achieves more powerful service capability.In this paper,we study the application of soft switch technology in voice transmission system,mainly from the two part of its research and design.The first part,the paper analyzes the related concepts,core functions and the network architecture and the related protocol standards of the soft switch technology from the background of the soft switching.The paper studies on the LAN and SIP protocol technology,briefly understands the principle of program-controlled exchange,compares the soft switch network compared with the traditional telephone network,discusses the facing problems in the development of soft switch's network,describes the interface protocol of soft switch network,analyzes three networking modes of the soft switch system: the static dual network mode,the dynamic dual home networking mode and the load sharing mode.In this paper,the selection of the network is static double attribution group.The second part,the paper sets up a voice transmission system based on soft switching according to the company which has more than 2000 employees and an office building for the12 layers with 20 offices on each layer.In the voice transmission system which is designed in this paper,the business layer is composed of MRS6000 multimedia resource server,control layer is composed of integrated network management system of fixed network iManager N2000 and soft switch SoftX3000,transmission layer is composed of Ethernet LAN,access layer uses the universal media gateway UMG8900 and IAD,the call control process is based on the soft switch and SIP system.Through the analysis of the demand of the voice transmission system of the company,the paper introduces the feasibility of using the soft switching technology and designs the corresponding soft switch platform,SIP gatewayscheme and distributed soft switch system.Then,analyze the reliability and expansibility of the voice system.At last,test the function of the voice process of the voice transmission system.The results show that the system has low failure rate and better voice call quality.The voice transmission system,which is based on soft switch and designed in this paper,has simple system configuration,transmits data by the Internet,saves telephone charges and has good reliability and expansibility.Namely,this system has a good practical value.