通信技术和理论的发展离不开有效性和可靠性这两个基本问题,两者的要求集中反映在通信系统需要有良好的抗干扰特性。一些有线通信系统,由于干扰问题得不到解决而面临着瓦解和瘫痪。为了达到消除干扰的目的,电信专家采取了很多措施,如交换机中心的全面屏蔽、接地监测、浪涌吸收等,尽管如此,目前国内在抗干扰技术方面的发展远远跟不上通信事业发展的需要。 干扰的结果会引起电信设备的虚假振铃、信号差错、用户交换机的干线噪声、甚至使设备停止工作,出现不明原因的损坏,还会引起数据回路的脉动噪声,使设备不能正常工作。用户线路的干扰噪声会引起拨号出错,保护器和保险丝 The development of communication technologies and theories can not be separated from the two basic problems of validity and reliability. The requirements of both are reflected in the fact that the communication system needs to have good anti-interference characteristics. Some wired communication systems are facing disruption and paralysis due to unresolved interference issues. In order to achieve the purpose of eliminating interference, telecom experts have taken many measures, such as full shield of switch center, ground monitoring, surge absorption, etc. However, at present, the development of anti-jamming technology in China is far behind the development of communications need. Interference results in false ringing of telecommunications equipment, signal errors, trunking noise of the subscriber’s switch, and even stops the equipment for an unknown reason. It also causes pulsation and noise in the data circuit, preventing the equipment from working properly. Interference noise on subscriber lines can cause dialing errors, protectors and fuses