VPN Technologies Applicating In Telecommunication Services

The group customers, such as large enterprises, can construct their owned intranets and get satisfactory services by the reliable and convenient way due to the application of Virtual Private Network (VPN) technologies. The constructed intranet not only can well be maintained and extended, but also have the high security. The provided sevices are flexible and multiform. As a kind of value-added service, the VPN contains a integrated industry chain consist of equipments manufacturing, network operating, services and content providing, etc. VPNs have become the important means for telecommunication operators to extend the serving scope, to innovate the serving mode, to upgrade the serving quality, and to improving the satisfaction degree of customers. In this dissertation, the technological principle, the engineering design, the network construction, and the service provision of VPN are brought forward in detail. The networking fundamental, the implementing scheme, the existing problem and technological method of VPN are also analyzed deeply. The application of VPN technologis in telecommunication group customers services is present by an example of the Social Secuity System Engineering Project. The leading points in the dissertation are:1. The technological characteristics and applicating performances of VPN are summarized by introduction of the basic concepts, the key technologies, the relating specifications and the security problems.2. The fundamental and target of designing VPN systems are determined by analyzing the applications and markets in telecommunication services. The MPLSVPN-based network structure is chose according to the function of VPN service platform. The application architecture of VPN, the influence of VPN on existing telecommunication networks, and the suggestion for reconstructing the traditional telecommunication networks are also put forward.3. The feasibility of constructing VPN networks is explained by analyzing the actuality of telecommunication network in Guiyang. The advantages of VPN technologies in telecommunication applications and the strategies for constructing the VPN networks and expanding the VPN services are present.4. In the Social Secuity System Engineering Project, a hybrid networking scheme with static optical VPN plus dynamic ADSL VPN is adopted. Such a hybrid network is economical because it not only can satisfy the application requirements, but also canutilize the existing network resources and can be extended flexibly. So, the hybrid networking scheme has the demonstration for the similar group customer telecommunication services applications.