<P> As of 2017, a 9 - 1 - 1 system is in use in Mexico, where implementation in different states and municipalities is being conducted . </P> <P> 999 is used in Singapore, Malaysia, Hong Kong, the United Kingdom, and many British territories amongst other places . 112 is the equivalent emergency number used in the European Union and various other countries . In the US, some carriers, including AT&T, map the number 112 to the emergency number 9 - 1 - 1 . 000 is used in Australia . 100 is the emergency number of India . </P> <P> In the earliest days of telephone technology, prior to the development of the rotary dial telephone, all telephone calls were operator - assisted . To place a call, the caller was required to pick up the telephone receiver, sometimes turn a magneto crank, and wait for the telephone operator to answer . The caller would then ask to be connected to the number they wished to call, and the operator would make the required connection manually, by means of a switchboard . </P> <P> In an emergency, the caller might simply say "Get me the police", "I want to report a fire", or "I need an ambulance or doctor". Until dial service came into use, one could not place calls without proper operator assistance . </P>

When does the show nine-one-one come back on