Based on network frame planning, the optimal planning of network section switch and connective switch is carried out again.
在网架规划基础上，再进行网络分段开关和联络开关的优化规划。
The frame structures, design principles and network planning of system based on Ethernet Passive Optical Network (EPON) are described.
描述了基于以太网的无源光网络系统的框架结构、设计原则和网络规划；
At present, the domestic and foreign network planning software has such problem, has used the right and wrong extension or the extension not strong portal frame construction.
目前，国内外的网络规划软件存在这样的问题，采用了是非扩展性或扩展性不强的框架结构。
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