Cisco Show interface 命令详解，适用于思科路由器的配置与调试，包括接口封装命令，环路设置命令，ARP协议。-Cisco Show interface command explain, apply to the Cisco router configuration and commissioning, including the interface encapsulation command, loop set command, ARP protocol.

环路滤波器参数计算与噪声研究（How to Calculate Loop Parameters and Phase Noise Contribution）-Loop filter parameter calculation and noise (How to Calculate Loop Parameters and Phase Noise Contribution)