Emergency telephone number in the context of "Crimestoppers"

Emergency services and rescue services are organizations that ensure public safety, security, and health by addressing and resolving different emergencies. Some of these agencies exist solely for addressing certain types of emergencies, while others deal with ad hoc emergencies as part of their normal responsibilities. Many of these agencies engage in community awareness and prevention programs to help the public avoid, detect, and report emergencies effectively. Emergency services are often considered first responders, and typically have dedicated emergency vehicles.

Emergency services have one or more dedicated emergency telephone numbers reserved for critical emergency calls. In many countries, one number is used for all of the emergency services (e.g. 911 in many parts of the Americas, 999 in the United Kingdom, 112 in continental Europe, 000 in Australia). In some countries, each emergency service has its own emergency number (e.g. 110 for police, 118 for coast guard, 119 for fire and medical in Japan; 110 for police, 119 for fire, 120 for medical in China). Calls made to emergency services to report emergencies are called calls for service.

Free-to-air (FTA) services are television (TV) and radio services broadcast in unencrypted form, allowing any person with the appropriate receiving equipment to receive the signal and view or listen to the content without requiring a subscription, other ongoing cost, or one-off fee (e.g., pay-per-view). In the traditional sense, this is carried on terrestrial radio signals and received with an antenna.

FTA also refers to channels and broadcasters providing content for which no subscription is expected, even though they may be delivered to the viewer/listener by another carrier for which a subscription is required, e.g., cable television, the Internet, or satellite. These carriers may be mandated (or OPT) in some geographies to deliver FTA channels even if a premium subscription is not present (providing the necessary equipment is still available), especially where FTA channels are expected to be used for emergency broadcasts, similar to the mandatory emergency phone number service provided by mobile phone operators and manufacturers.

A call for service (CFS, also known as a job, hitch, incident, callout, call-out, or simply a call) is an incident that emergency services or public safety organizations (such as police, fire departments, and emergency medical services) are assigned to resolve, handle, or assist with. Operationally, a call for service is any incident where emergency services are a third-party intervener, regardless of whether their presence was requested or they came across it in the course of their duties.

The term "call" originates from the telephone calls made by the public to emergency telephone numbers to report the incident to dispatchers and request an emergency service response. There are two types of calls for service: dispatched calls, which are made by members of the public through emergency number calls; and self-initiated, self-generated, or directed calls, which are made by emergency services personnel.

Emergency medical services (EMS), also known as ambulance services, pre-hospital care or paramedic services, are emergency services that provide urgent pre-hospital treatment and stabilisation for serious illness and injuries and transport to definitive care. They may also be known as a first aid squad, FAST squad, emergency squad, ambulance squad, ambulance corps, life squad or by other initialisms such as EMAS or EMARS.

In most places, EMS can be summoned by members of the public (as well as medical facilities, other emergency services, businesses and authorities) via an emergency telephone number which puts them in contact with a dispatching centre, which will then dispatch suitable resources for the call. Ambulances are the primary vehicles for delivering EMS, though squad cars, motorcycles, aircraft, boats, fire apparatus, and others may be used. EMS agencies may also operate a non-emergency patient transport service, and some have rescue squads to provide technical rescue or search and rescue services.

911, sometimes written 9-1-1, is an emergency telephone number in Canada and the United States, one of eight N11 codes of the North American Numbering Plan (NANP). Like other emergency numbers, dialing 911 for purposes other than reporting an emergency is a crime in most jurisdictions. Penalties for abuse or misuse of 911 can range from probation or community service to fines and jail time. Offenders can also be ordered to undergo counseling and have their use of telephones restricted or suspended for a period of time as a condition of probation.

Dialing 911 from any telephone will link the caller to an emergency dispatch office—called a public safety answering point (PSAP) by the telecommunications industry—which can send emergency responders to the caller's location in an emergency. In approximately 96 percent of the United States, the enhanced 911 system automatically pairs caller numbers with a physical address.

999 is an official emergency telephone number in a number of countries and allows the caller to contact emergency services for assistance. Countries and territories using the number include Bahrain, Bangladesh, Botswana, the Cook Islands, Eswatini, Ghana, Guernsey, Hong Kong, the Republic of Ireland, the Isle of Man, Jersey, Kenya, Macau, Malaysia, Mauritius, Niue, Poland, Qatar, Sudan, Saudi Arabia, Singapore, Trinidad and Tobago, Seychelles, Uganda, the United Arab Emirates, the United Kingdom, and Zimbabwe.

112 is a common emergency telephone number that can be dialed free of charge from most mobile telephones and, in some countries, fixed telephones in order to reach emergency services (ambulance, fire and rescue, police).

112 is a part of the GSM standard and all GSM-compatible telephone handsets are able to dial 112 even when locked or, in some countries, with no SIM card present. It is also the common emergency number in nearly all member states of the European Union as well as several other countries of Europe and the world. 112 is often available alongside other numbers historically used in the given country to access emergency services. In some countries, calls to 112 are not connected directly but forwarded by the GSM network to local emergency numbers (e.g., 911 in North America, 999 in the United Kingdom and Hong Kong, and 000 in Australia).

000 or Triple Zero is the primary national emergency telephone number in Australia and the Australian External Territories. Triple Zero calls are initially answered by a Telstra Emergency Access Service Point, then transferred to the requested state and territory emergency services organisations. The Triple Zero system is overseen by the Australian Communications and Media Authority (ACMA) and is intended only for use in life-threatening or time-critical emergencies that requires police, fire or ambulance.

When called on a mobile or satellite phone, the international standard emergency telephone number 112 will be redirected to Triple Zero (000). Other numbers including 911 may be answered, though this is strongly discouraged by the government. For people with a speech or hearing impairment, 106 can be called from a telecommunications device for the deaf (TDD) textphones. 000 is the only emergency number that can be dialled from fixed lines including public payphones. No SIM card or calling credit is required to call emergency services, and national 'camp-on' arrangements mean that calls to Triple Zero will be passed through any available mobile network.