As we all know, the alarm phone number in my country is 110, while that in the United States is 911. In fact, the alarm numbers of different countries in the world are not uniform. So, what was the setting for the alarm calls in the first place?
To understand this question, we need to first understand the history of the development of the telephone.
When the telephone was first invented, it needed to be answered by an operator. By the time telephony began to become widespread, operators were overwhelmed. At the end of the 19th century and the beginning of the 20th century, the dial telephone was born. The dial itself is backed by a spring, and you need to insert your finger into the hole corresponding to the number and dial clockwise. According to the order, 1 is the best dial, with the shortest movement trajectory and the shortest rebound time when dialing; 0 is the farthest, and it takes almost a full circle to dial.
One problem with dial-up telephones is to dial one by one in case of emergency and call the police. Therefore, it is necessary to set up an emergency alarm number that can be quickly dialed.
What number is appropriate to set? One-digit and two-digit numbers cannot be used, because it is too easy to dial by mistake. It can't have too many digits, so 3 digits are more in line with the requirements. So what combination of numbers to choose? It should not be too simple. For example, numbers such as 111 and 222 are easily misdialed by children, but they should not be too complicated and difficult to remember. So, in 1937, London, as the first area in the world to use emergency numbers, chose a number like 999. 9 is the second longest dialed digit and therefore a relatively difficult number to touch by mistake.
Later, many countries set up their own emergency telephone numbers, the basic idea is this - easy to remember, it takes a short time to dial, but it is not easy to dial by mistake. Many countries use two 1s and one other number, such as 112, 110. But there are also countries that put the easy-to-dial 1 at the back. For example, the US emergency number 911.
So when did we start using the number "110"? Some people have verified that in the 1950s, some places have begun to use 110 as a bandit police phone, specifically to accept criminal cases. Some people have verified that in the 1970s, the Ministry of Posts and Telecommunications learned from the experience of Japan and South Korea and to facilitate the dialing of pulse telephones, it began to use "110" as the telephone number for the police.
On January 10, 1986, the Guangzhou Public Security Bureau took the lead in establishing the first 110 alarm service desk in my country, and officially launched the 110 police response work. In June 1987, the Ministry of Public Security issued a document requesting public security bureaus in major and medium-sized cities to generally establish 110 alarm service desks within one or two years and put them into use as soon as possible. Since then, the 110 alarm telephone has officially developed into the 110 alarm service desk.
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