一、前言改革开放后,国际国内交往日益频繁,民航事业飞速发展。与此同时,这对空中交通管制也提出了更高的要求和挑战——如何在新的形势下更好地保障飞行安全而不影响飞行流量。面对这种形势,民航对空管通信设施进行了大规模建设,铺设和租用了大量的传输电缆,大大改善了航路通信,有效地提高了通信设施的可靠性,加强了通信的保障能力。随着科学技术的飞速发展,信息更流畅,从而使得飞行安全能够做到“万无一失”。然而传统的用户电缆在传输数字化的高速宽带数据流时,会 I. Introduction After the reform and opening up, the international and domestic exchanges have been increasingly frequent and the cause of civil aviation has developed rapidly. At the same time, this poses higher requirements and challenges for air traffic control - how to better ensure flight safety without affecting flight flow in the new situation. Faced with this situation, CAAC has carried out large-scale construction of air traffic control facilities, laid and leased a large number of transmission cables, greatly improved route communications, effectively improved the reliability of communications facilities and enhanced the security capability of communications. With the rapid development of science and technology, the information is smoother, so that flight safety can be “foolproof.” However, traditional subscriber cables are used when transmitting digitized high-speed broadband data streams