英语翻译The emergency telephone number is a special case in the

英语翻译
The emergency telephone number is a special case in the country's telephone number plan.In the past,calls to the emergency telephone number were often routed over special dedicated circuits.Though with the advent of electronic exchanges these calls are now often mixed with ordinary telephone traffic,they still may be able to access circuits that other traffic cannot.Often the system is set up so that once a call is made to an emergency telephone number,it must be answered.Should the caller abandon the call,the line may still be held until the emergency service answers and releases the call.
An emergency telephone number call may be answered by either a telephone operator or an emergency service dispatcher.The nature of the emergency (police,fire,medical) is then determined.If the call has been answered by a telephone operator,they then connect the call to the appropriate emergency service,who then dispatches the appropriate help.In the case of multiple services being needed on a call,the most urgent need must be determined,with other services being called in as needed.
Emergency dispatchers are trained to control the call in order to provide help in an appropriate manner.The emergency dispatcher may find it necessary to give urgent advice in life-threatening situations.Some dispatchers have special training in telling people how to perform first aid or CPR.
In many parts of the world,an emergency service can identify the telephone number that a call has been placed from.This is normally done using the system that the telephone company uses to bill calls,making the number visible even for users who have unlisted numbers or who block caller ID.For an individual fixed landline telephone,the caller's number can often be associated with the caller's address and therefore their location.However,with mobile phones and business telephones,the address may be a mailing address rather than the caller's location.The latest "enhanced" systems,such as Enhanced 911,are able to provide the physical location of mobile telephones.This is often specifically mandated in a country's legislation.

紧急电话号码是一种特殊情况在该国的电话号码计划.在过去,呼叫紧急电话号码往往传输特殊专用电路.虽然随着电子交流这些要求现在往往与普通电话的混合交通,他们仍然可以访问,其他交通线路不能.往往是一套系统,以便一旦调用了一个紧急电话号码,就必须回答.如果来电者放弃要求,该行仍有可能举行的紧急服务,直到答案和发布的呼吁.
紧急电话号码,呼叫可能会回答不是电话运营商或服务的紧急调度.的性质,紧急（警察,消防,医疗） ,然后确定.如果要求已经回答了电话接线员,他们然后连接呼吁适当的紧急服务,谁然后派遣适当的帮助.在案件多服务需要的要求,最迫切需要必须确定,与其他服务被称为在必要.
紧急调度员进行培训,以控制要求,以便提供帮助以适当的方式.紧急调度可能认为有必要给予紧急建议在危及生命的情况.有些调度员有特殊培训告诉人们如何执行或心肺复苏急救.
在世界许多地区,紧急服务,可以识别的电话号码的电话已被从.这通常是使用该系统的电话公司使用,以法案要求,使一些用户甚至看见谁也未号码或谁块号码.个别固定座机电话,来电者的电话号码往往可以与来电者的地址,因此它们的位置.然而,随着移动电话和业务电话,地址可能是一个邮寄地址,而不是呼叫者的位置.最新的“增强型”系统,如增强型911 ,能够提供的物理位置的移动电话.这常常是具体负责在一个国家的立法.