 直接保密通信系统，又称为“热线”，是旨在供美国和俄罗斯最高层(自1963 年起)以及美国和中国(自 1998 年起)使用的应急和非应急安全通信系统。该系统由各国政府维持，以确保使领导人做好准备，来处理我们在国际上面临的所有的国家安全危机。
• The Direct Secure Communication System, also known as the “Hotline,” is an emergency and non-emergency secure communication system intended for use by the highest leadership of the United States and Russia (since 1963) and with China (since 1998). The system is maintained by each government to ensure that leaders are prepared to manage the full range of national security crises we face internationally.