| In the 21st century, with the rapid development of communication technology and the improvement of IP technology and computer communication technology, packet-switching network based on IP switching will be substituted for traditional telecommunication network based on circuit switching step by step.Combining the process of building intelligent fixed network in Daqing Oilfield, this paper analyses the current situation of fixed network, makes an investigation on the upgrading requirement, propose a feasible scheme, discusses the application of the next generation network based on soft-switch in Daqing area, emphatically describes the feasibility of the transition from PSTN to NGN, explains how to take advantage of exiting network resources and integrate service platform to provide intelligent services which meet the market demand with fixed network, proposes a blueprint for the construction of new network, finally introduces the method of building a new database that is able to realize centralized management by configuring server SDC. |