The System Test Of Enterprise IP Telephony Service For Integrated Services Information Network

IMS is an IP Multimedia Subsystem which is put forward by 3GPP in "Release 5" version, the core characteristic is using SIP protocol and not relative to access. The reason for mobile operator to deploy and build this IMS core network is that many data service can not be successfully applied due to network bandwidth, terminal unit restraint, user experience scarcity and uncertain calculation of cost. IMS is designed for real-time, end-to-end mobile service. Through some key technique IMS implements end-to-end communication. Besides, IMS enable mobile operator to provide nonrealtime end to end operation. That is to say, IMS is a core network which both effectively raises user experience and the profits of operator. That is the fundamental reason for us to choose IMS.Recent years, driven by market demand, China Mobile Communication has succeeded in construction of the world's largest Softswitch network, self-defined regulation of the whole Softswitch station, and CM-IMS solution scheme which based on IMS construction and make up the deficiency in develop operation.Based on technique criterion of Integrated Services Information Network Enterprise IP Telephony Service put forward by China Mobile Research Institute, this item enacts test criterion of Integrated Services Information Network Enterprise IP Telephony.This text minutely explicates origin of IMS, development both domestic and abroad, and the relation between IMS and IP Telephony system. It introduces IMS knowledge and basic system test technology related to the test. In addition, it describes IP Telephony system of China Mobile enterprises which provides requirements and analysis for test in the future. According to related service criterion we worked out test cases, and accomplish the system testing.