Emergency Call 911☎️美国急救电话为何是911

1. In the year 1967 when the FCC met with AT&T to establish a nationwide emergency phone number, everyone realized that only a few decent number combinations were available. These number combinations had never been used before for area codes, service codes or office codes. 2. However among the available combinations, the number combination 9-1-1 seemed to be the most optimal. First, the number nine is just one hole away from the finger stop on North American rotary phones. It is also easy to locate the number one even in pitch darkness. It's locatedat the top of the circular dial. 3. Why did the nationwide emergency number in the U.S. notbegin with zero or one? Well the answer is historical again. The number zero is usually reserved for operator assistance and the number one is used to dial international phone numbers from the United States.  1967年，当联邦通信委员会与美国电话电报公司（AT&T）商议建立一个全国性的紧急电话号码时，大家都意识到，只有几个像样的号码组合可用。这些号码组合以前从未被用作区号、服务号或办公室专用号。 然而在可用的组合中，号码组合 9-1-1 似乎是最佳的。首先，数字9离北美旋转式电话的指止点只有一孔之遥。即使在漆黑的环境中，也很容易找到数字1的位置。它位于圆形拨号盘的顶部。 为什么美国的全国性紧急号码不是以 0 或 1 开头的呢？嗯，答案又是与历史有关。数字 0 通常保留给接线员协助，而数字 1 则用于从美国拨打国际电话。