The automation of electric power system is developing toward open , standardization and distribution . the problem caused by the disunity of communication protocol in electric system , is becoming standing out more and more . the demand for standardization of the protocol and the desirability of constructing a transparent data environment are more urgent . it has become a common problem that realizing data communication and data sharing in different protocol systems 电力系统自动化正朝着标准化、分布式和开放性的方向发展。在电力系统通信中由于规约不统一而引起的问题显得日益突出，人们对网络协议标准化的要求和建立透明的数据环境的愿望也越来越来迫切。在不同的协议体系中实现数据通信和数据共享成为了一个普遍问题。
First , it gives a comprehensive introduction and analysis on the cti technology . then it introduces the subscriber call procedure on telephone network and some power system communication criterion . on the basis of analysis on dispatching telephone test flow , model and mathematical analyzing , the author developed a valuable dispatching - telephone auto - test system based on the cti technology 文中首先对cti技术进行了较为全面的介绍和分析，其后介绍了电话网络中用户线部分的呼叫过程及电力系统通信网络的一些行业标准，在对调度电话测试流程、模型及数学分析的基础上，基于cti技术开发出了一套具有较高实用价值的调度电话自动测试系统。
