(U-SYSSoftX3000 softswitch system (hereinafter referred to as SoftX3000) is a large-capacity softswitch device developed by Huawei Technologies Co., Ltd. It adopts leading software and hardware technology, has rich service supply capabilities and powerful networking capabilities, and is mainly used in NGN the network control layer. In addition, when SoftX3000 is used in combination with the gateway device UMG8900 produced by Huawei, it can also be used as a circuit switch device (CC08EV) or a video interworking gateway device (VIG8920). Including: architecture, interface, signaling and protocol, OAM system, business and function, networking and application, reliability and security planning, technical indicators and environmental requirements)