According to the theory of spc exchange , we devise and develop an experimental system of automatic exchange to meet the need of teaching and practice 本文结合程控交换原理课程及其教学实践要求,开发了一套用于教学演示及实验使用的小型程控交换机仿真系统。
The automatic exchange of information in logistics industry is an important factor that restricts the quick development of the industry . in addition , current two - tier client / server information systems cannot meet the need of modern logistics industry ' s development 物流企业信息的自动交换是制约物流业快速发展的主要因素,另外现在的信息系统的两层c s模式也不能适应物流发展的需要。
The municipality has an advanced modern communications system , with an optic - fiber transmission network of 3 , 000 kilometers of large capacity and high efficiency , a long - distance automatic exchange capacity of 20 , 000 terminals , electric lines of 30 , 000 and a basic multimedia and high - speed broad - band communications network 现代通信发达,构建了大容量、高效率、长达3000多公里的光纤传输网,长途自动交换机容量达2万路端,电路3万多条,基本建立了多媒体、高宽带的通信网络。