Telegraph equations, can be looked as cascade connection of two-port network of lumped circuit of transmission line, is a hyperbolic partial differential equations.
传输线可以看作集中参数二端口网络的级联，其数学模型—电报方程是一阶双曲型偏微分方程组。
2
In the core router for optical burst switching network, multi-classes traffic wilt use differential probability to choose output port for transmission due to the choosing of different routing.