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Introducing the P2P (Peer-to-Peer) technology into SIP (Session Initiation Protocol) networks can improve VoIP (Voice on Internet Protocol) system's reliability and scalability, and reduce the operating costs. In order to provide better and more comprehensive services in VoIP system, it is necessary to communicate with the traditional telecommunications(More)
To enhance the training manintenance and training level of a certain type command and control system, the online virtual maintenance training system based on fault cases were developed. This system utilizes the modular structure. It is composed of the management modules, training modules, test modules and detection modules. By using the Access databases,(More)
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