主要用于对图论和三角测量的研究的工具箱，包含很多分析模拟网络拓扑的函数-mainly for the Graph Theory and Research Triangle measurement toolkit include many analyze the function of the network topology

现代交换原理讲义CH1_交换概论ch2 通信信源模型-new070327_new-2CH2_交换网络ch3_Erlang拒绝和等待系统CH3_数字程控电话交换与电话通信网ch4_通信网络性能分析CH4_信令系统CH5_分组交换与分组交换网ch5_网络拓扑结构分析CH6_ISDN交换与综合业务数字网ch7_网络可靠性分析-Principles of modern exchange notes Introduction CH1_ exchange communication channel ch2

SDH transmission and switching performance has free combination of function blocks composed through its family of devices, to achieve a variety of different levels and network topology is very flexible