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为了适应电信网不断变化的环境，日本ＮＴＴ公司已开发了一种新的节点系统结构。其网络由明确规定的各个部件（即模块）组成，各模块之间具有各种不同的规定接口。所有结构均按功能及其实体方面进行分解，这比通常严密配置的功能具有更大的灵活性。该节点系统结构是一种与硬件机构和物理接。有关的实体。它规定组成节点的模块之间的“Ｍ接口”，并提供具有统一接口的模块间链路，便于模块的装拆。采用这种结构，将减少研制时间和费用，并使网络操作简单化。
In order to adapt to the changing environment of telecommunication network, NTT Company of Japan has developed a new node system structure. Its network consists of clearly defined components (ie modules), with a variety of different interfaces between the modules. All structures are broken down by function and its physical aspects, which gives more flexibility than the usual closely configured features. The node system architecture is a hardware architecture and physical connection. Related entities. It specifies the “M interfaces” between the modules that make up the node and provides an inter-module link with a unified interface to facilitate the assembly and disassembly of the module. With this architecture, development time and costs will be reduced and network operations will be simplified.