Research And Improvement On SUBCENTREX Softswitch System

NGN is a brand new IP based communications network, which can offer various services such as voice, data, multimedia etc. It is a distributed, telecom-level, port-to-port and unitive network which is established on single Packet Switching Network, applies Softswitch technology, all kinds of application server and media gateway technology. NGN congregating fixed, mobile and wide-band networks commits itself to communicate with PSTN and mobile network perfectly. Meanwhile, NGN provides open system architecture in order that new services can be developed and disposed in short order.Softswitch technology is the core of NGN. The basic idea behind Softswitch solution is to separate call processing from transport. As the control function module of NGN, Softswitch primarily put forward making IP network replace traditional PSTN, and supply more multimedia services by combining new access modes and terminals. Moreover, as the core protocol of Third Generation Mobile Communications IP Network, SIP has gained more and more recognition. The architecture of Softswitch tends towards the open service architecture which not only includes Internet architecture but also contains multi-user...