美国的通信网络因恐怖分子对世贸大厦和五角大楼撞击事件而激发的业务量而过度使用 ,主要是由于大量的人们试图通过付费电话和移动电话与亲戚朋友通信。在撞击事件后的时间里在新泽西和纽约区域 ,Ｃｉｎｇｕｌａｒ无线公司看到了在它的那部分使用其网络的企图墙加了１０００ % The U.S. communications network is overused by the amount of traffic that terrorists have inspired in the attacks on the World Trade Center and the Pentagon, largely due to the mass of people trying to communicate with relatives and friends via payphones and mobile phones. Cingular Wireless saw an increase of 1,000% in its attempts to use its network in parts of New Jersey and New York during the post-crash period