The world's oldest emergency call service was introduced first in the London area in 1937. What telephone number was used?
999 (emergency telephone number) there are four emergency services which maintain full-time emergency control centres (ECC), to which 999 emergency calls may be directly routed by emergency operators in telephone company operator assistance centres (OAC). These services are as follows, listed in the order of percentage of calls received: Other emergency services may also be reached through the 999 system, but do not maintain permanent emergency control centres. All of these emergency services are summoned through the ECC of one of the four principal services listed above: First introduced in the London area on 30 June 1937, the UK's 999 number is the world's
Emergency telephone number 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