A civil defense siren, also known as an air-raid siren or tornado siren, is a siren used to provide an emergency population warning to the general population of approaching danger. It is sometimes sounded again to indicate the danger has passed. Some sirens, especially within small municipalities, are also used to alert the fire department when needed. Initially designed to warn city dwellers of air raids during World War II, they were later used to warn of nuclear attack and natural disasters, such as tornadoes. The generalized nature of sirens led to many of them being replaced with more specific warnings, such as the broadcast-based Emergency Alert System and the Cell Broadcast-based Wireless Emergency Alerts and EU-Alert mobile technologies.
Enhanced 911 is a system used in North America to automatically provide the caller's location to 911 dispatchers. 911 is the universal emergency telephone number in the region. In the European Union, a similar system exists known as E112 and known as eCall when called by a vehicle.
An Amber Alert or a child abduction emergency alert is a message distributed by a child abduction alert system to ask the public for help in finding abducted children. The system originated in the United States.
Text messaging, or texting, is the act of composing and sending electronic messages, typically consisting of alphabetic and numeric characters, between two or more users of mobile devices, desktops/laptops, or another type of compatible computer. Text messages may be sent over a cellular network or may also be sent via satellite or Internet connection.
Mobile telephony is the provision of telephone services to mobile phones rather than fixed-location phones. Telephony is supposed to specifically point to a voice-only service or connection, though sometimes the line may blur.
An emergency population warning is a method where by local, regional, or national authorities can contact members of the public to warn them of an impending emergency. These warnings may be necessary for a number of reasons, including:
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.
Cell Broadcast (CB) is a method of sending messages to multiple mobile telephone users in a defined area at the same time. It is defined by the ETSI's GSM committee and 3GPP and is part of the 2G, 3G, 4G LTE (telecommunication) and 5G standards. It is also known as Short Message Service-Cell Broadcast (SMS-CB) or CB SMS.
The Standard Emergency Warning Signal (SEWS) is a warning siren used in Australia to alert the public of danger. The siren is played over radio, television or public address systems in public places to warn of bushfire, flood, cyclone, tsunami, earthquake or terrorist attack.
Next Generation 9-1-1 refers to an initiative aimed at updating the 9-1-1 service infrastructure in the United States and Canada to improve public emergency communications services in a growing wireless mobile society. In addition to calling 9-1-1 from a phone, it intends to enable the public to transmit text, images, video and data to the 9-1-1 center. The initiative also envisions additional types of emergency communications and data transfer. This NG9-1-1 infrastructure is intended to replace the current services over time. The National Emergency Number Association (NENA) first identified the need for NG9-1-1 in 2000, and started development actions in 2003, and is nearing full definition and standards for NG9-1-1. Since 2006, the US Department of Transportation (DOT) in the United States and the Canadian Radio-television and Telecommunications Commission (CRTC) in Canada have been leading their respective initiatives, which include research and development projects aimed at advancing NG9-1-1. On January 24, 2013, the CRTC announced the first step toward a Canadian implementation of NG9-1-1 and, in March 2016, began a consultation with the public to discuss what services should be offered, who will play a role in offering these services and how these services should be paid for. Several US states have implemented versions of NG9-1-1, as of October 2013.
Wireless Emergency Alerts, is an alerting network in the United States designed to disseminate emergency alerts to mobile devices such as cell phones and pagers. Organizations are able to disseminate and coordinate emergency alerts and warning messages through WEA and other public systems by means of the Integrated Public Alert and Warning System.
Emergency Alert Australia is an emergency communications scheme set up by the Australian Government in response to the Black Saturday bushfires of 2009, utilizing telecommunications systems as another form of alert for citizens. The system sends both SMS messages and pre-recorded sound messages with information regarding the alert which can be statewide, or reduced to a small location.
An emergency communication system (ECS) is any system that is organized for the primary purpose of supporting one-way and two-way communication of emergency information between both individuals and groups of individuals. These systems are commonly designed to convey information over multiple types of devices, from signal lights to text messaging to live, streaming video, forming a unified communication system intended to optimize communications during emergencies. Contrary to emergency notification systems, which generally deliver emergency information in one direction, emergency communication systems are typically capable of both initiating and receiving information between multiple parties. These systems are often made up of both input devices, sensors, and output/communication devices. Therefore, the origination of information can occur from a variety of sources and locations, from which the system will disseminate that information to one or more target audiences.
NL-Alert is a Cell Broadcast alarm system in use by the Dutch government to quickly alert and inform citizens of hazardous or crisis situations. Using this system, authorities can send messages to users of mobile phones in specific areas by using specific cell towers to alert phones within their reach. NL-Alert is one of the first implementations of the EU-Alert or Reverse 1-1-2 legislation as defined by the binding European Electronic Communications Code (EECC) using the Cell Broadcast technology for the delivery of public warning messages to the general public.
Emergency Mobile Alerts (EMA) is an alerting network in New Zealand designed to disseminate emergency alerts to mobile devices. Emergency Mobile Alerts are messages about emergencies sent by New Zealand authorised emergency agencies to capable mobile phones. The alerts are sent to participating wireless providers who will distribute the alerts to their customers with compatible devices via Cell Broadcast, a technology best suitable for public warning as it simultaneously delivers messages to all phones using a Mobile Cell tower. Similar solutions are implemented in the United States, The Netherlands (NL-Alert), European Union (EU-Alert), Canada, Japan, Taiwan, Chile, Philippines. One2many B.V. provides this modern Emergency Mobile Alert system including the Cell Broadcast systems and the CAP based centralised Public Warning management system.
EU-Alert is the generic term for the European Public Warning Service based upon Cell Broadcast technology.
Emergency Cell Broadcast System (ECBS) is an alert broadcast system in the Philippines, designed to disseminate emergency alerts and warnings to mobile devices via cell broadcast services (CBS)
There are various Wireless Emergency Alerts in Germany which inform citizens about important incidents, disasters and dangerous situations, as well as severe weather. Since February 2023, the alerts of the four main systems have been shared and disseminated in parallel.
The United Kingdom's mobile phone alert system is an emergency population warning system that uses cell broadcast. Early testing began in 2014, with the first test alert sent in March 2020. The warning system is intended for use in major incidents such as flooding or terror attacks. The Emergency Alert System was launched on 19 March 2023, and tested on a nationwide basis for the first time on 23 April 2023.
The National Messaging System (NMS) is an upcoming Australian cell broadcast emergency population warning system that is slated to replace the current location-targeted, SMS-based Emergency Alert system. It is currently expected to be in operation by late 2024.
