| 1. | General specification for power supply system of spc exchange
程控电话交换机电源通用规范 |
| 2. | Spc exchange fundamentals
程控交换原理 |
| 3. | R & d and manufacture of spc exchanges and innovative components and devices have reached a certain scale and level
城市彩电普及率已达每百户1008台，农村电视机普及率达到每百户70台以上(其中彩电普及率达每百户27 . 2台) 。 |
| 4. | This is a clever use of n - isdn , which is technologically rather mature . in addition , today s spc exchanges mostly provide such a function
N - isdn在技术上已非常成熟，而且现在的程控交换机基本上都具备了这项功能。 |
| 5. | All these changes took place after the first spc exchange was put into service in the capital in 1984 , enabling the use of pcm circuits for local trunks
这是从1984年北京开通第一个程控交换局，首次在市内中继使用pcm数字电路之后巨大的变化。 |
| 6. | 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。 |
| 7. | And most of this knowledge has to been transferred to the students by pratice , so we need a set of simulation of the spc exchange
该课程侧重介绍程控交换的基本概念和工作原理，课堂教学内容迫切需要相应的实验辅助，以达到帮助学生正确掌握和深入理解课程内容的目的。 |
| 8. | At the same time , 4 . 5 million pc sets , 35 million lines of spc exchanges , 30 million color tv sets , 13 million mobile handsets and 2 . 1 billion integrated circuits will be added
同时，生产微机450万台，程控交换机3500万线，彩电3000万台，移动电话手机1300万部，集成电路21亿只。 |
| 9. | As the spc exchange develops , in the digital transmission network the basic unit of 64 kbits as a circuit has gradually been replaced by that of 30 2 mbits circuits ( hereinafter referred to as e1 )
数字传输网随着程控交换机的发展，逐渐改变了由64kbits速率为一条电路的基本计算单位，接受了2mbits （下称e1 ） 30条电路为一个基本单位的概念。 |
| 10. | The proliferation of spc exchanges in telecommunication operator ( telco ) networks forced the centralization of supplementary services in special network nodes in order to facilitate the update and introduction of such these services
无线电通讯操作网络中存储控制程序交互系统的增多，促进了各独立网点的附加服务的集中化，以便于这些服务的更新和介绍。 |
