摘要: NE20作为各地区局广泛使用的重要路由汇聚设备，需要满足长期稳定运行的要求，本文结合湖北空管分局TDM网主用汇聚节点NE20发生的故障，TDM网承载的甚高频、雷达、ADS-B和甚高频监控业务出现短暂中断的现象，通过详细的排查过程，原因分析和改进措施，成功定位故障源头并提出有效的解决方案。

Abstract: As an important routing aggregation device widely used by various regional bureaus, NE20 needs to meet the requirements of long-term stable operation. This article combines the failure of the main aggregation node NE20 of the TDM network of the Hubei Air Traffic Control Bureau. The TDM network carries VHF, radar, ADS-B and VHF monitoring services were briefly interrupted. Through a detailed troubleshooting process, cause analysis and improvement measures, the source of the fault was successfully located and effective solutions were proposed.