一、概述 随着电话的普及,电话网络日趋庞大,对网络及网络中的交换系统的维护也日趋困难。以往分散式的维护体制和维护手段越来越不能适应网络的发展。例如网络中的每个交换机都有自己的操作维护系统,而对整个网络,却缺乏一套完善的监控设备,即网络的可操作性较差;另外,先进的交换设备需要由专业技术人员来维护,而专业技术人员的培训需要大量的人力、物力和财力。这样往往一方面专业技术人员 I. Overview With the popularity of the phone, the growing number of telephone networks, network and network switching system maintenance is also increasingly difficult. In the past, decentralized maintenance systems and maintenance methods were increasingly unable to adapt to the development of the Internet. For example, each switch in the network has its own operation and maintenance system, but for the entire network, it lacks a complete set of monitoring equipment, that is, the network has poor operability. In addition, advanced switching equipment needs professional technicians Maintenance, and professional and technical personnel training requires a lot of manpower, material and financial resources. This is often the case on the one hand, professional and technical personnel