一、前言随着大规模,超大规模集成电路技术的发展,微型计算机和微机芯片的成本不断降低,越来越多的通信设备逐步实现数字化,程控化,智能化。这就加速了通信事业的发展,使得通信服务部门增加了不少的综合服务项目。就我国目前的长话情况而言,有全自动的,有半自动的,还有人工的。长途半自动对端设备在全国范围内应用还是比较广泛的,可惜目前现场应用的仍停留在采用布控方式进行控制的,这对扩大 I. INTRODUCTION With the development of large-scale and very large-scale integrated circuit technology, the cost of microcomputers and microchip chips has been declining. More and more communication equipments have been digitized, programmed and intelligentized gradually. This accelerated the development of the communications industry and added many integrated services to the communications service. As far as China’s current long-distance situation is concerned, it is fully automatic, semi-automatic and man-made. Long-distance semi-automatic remote devices in the country or a wide range of applications, but unfortunately the current site applications remain in the use of cloth control mode of control, which is to expand