protection switching

Check the function of the switching devices and the controls, interlocks, protection, annunciation.

对接触器控制和外部联动装置要求较低，因为重要的控制功能已被集成。

Instructing the switching network to realize the telephone communication needs much of equipment charges, lines charges, protection charges, project charges and time.

建立程控交换电话网络实现电话通信需要大量的设备费、线路费、维护费和工程费等费用，并且需要一定的施工工期。

The calculation of session key groups and the verifying of parameters' correctness are done by simple bit operation on the basis of completing identity authentication, and the asynchronous attack can be resisted by dynamically switching the parameter of the protection keys.

协议在完成身份认证的基础上，会话密钥组的计算与参数的正确性确认均采用简单的位运算，并且通过参保密钥的动态切换可以抵抗非同步攻击。

And particularly analyze and compare the protection switching time of each recovery scheme.

然后对比分析了各个恢复方案的保护倒换时间。

Inspect switching device, control, interlocking, protection, signal and functions of other devices.

检查开关装置 、 控制 、 联锁 、 保护 、 信号和其他装置的功能.

The article analyzes all factors concerning switching time of bi-directional multiplex section protection ring on 2-fiber, gives the approximate engineering calculation formula and basis.

本文对影响SDH二纤双向复用段保护环的倒换时间的各种因素进行了分析，给出了工程设计中的近似计算公式与依据。

Research for fault recovery of MPLS mostly focuses on tow aspects, Rerouting and Protection Switching.

对MPLS故障恢复机制的研究主要集中在Rerouting和Protection Switching两个方面。