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  2. Emergency service response codes - Wikipedia

    en.wikipedia.org/wiki/Emergency_service_response...

    United States[edit] In the United States, response codes are used to describe a mode of response for an emergency unit responding to a call. They generally vary but often have three basic tiers: Code 3: Respond to the call using lights and sirens. Code 2: Respond to the call with emergency lights, but without sirens.

  3. Communication during the September 11 attacks - Wikipedia

    en.wikipedia.org/wiki/Communication_during_the...

    The report suggests the NYPD 9-1-1 center and FDNY dispatch were overrun by call volumes that had never been seen before. Adding to the confusion, radio coverage problems, radio traffic blocking, and building system problems occurred inside the burning towers. The facts show that much of the equipment worked as designed and users made the best ...

  4. 311 (telephone number) - Wikipedia

    en.wikipedia.org/wiki/311_(telephone_number)

    311 is a special telephone number supported in many communities in Canada and the United States. The number provides access to non-emergency municipal services. The number format follows the N11 code for a group of short, special-purpose local numbers as designated in the North American Numbering Plan . The telephone number 3-1-1 creates a ...

  5. 911 (emergency telephone number) - Wikipedia

    en.wikipedia.org/wiki/911_(emergency_telephone...

    911. 112 and 911. Other number, no redirection or redirection for mobile phones only. 911, sometimes written 9-1-1, is an emergency telephone number for Argentina, Canada, Dominican Republic, Jordan, Mexico, Pakistan, Palau, Panama, the Philippines, Sint Maarten, the United States, [2] and Uruguay, as well as the North American Numbering Plan ...

  6. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    Worldwide distribution of country calling codes. Regions are coloured by first digit. Country calling codes, country dial-in codes, international subscriber dialing (ISD) codes, or most commonly, telephone country codes are telephone number prefixes for reaching telephone subscribers in foreign countries or areas via international telecommunication networks.

  7. DEFCON - Wikipedia

    en.wikipedia.org/wiki/DEFCON

    DEFCON levels. The defense readiness condition (DEFCON) is an alert state used by the United States Armed Forces. For security reasons, the US military does not announce a DEFCON level to the public.

  8. Radio silence - Wikipedia

    en.wikipedia.org/wiki/Radio_silence

    Radio silence. In telecommunications, radio silence or emissions control ( EMCON) is a status in which all fixed or mobile radio stations in an area are asked to stop transmitting for safety or security reasons. The term "radio station" may include anything capable of transmitting a radio signal. A single ship, aircraft, or spacecraft, or a ...

  9. Anonymous messaging app allegedly sent 'fake' messages ... - AOL

    www.aol.com/news/anonymous-messaging-app...

    In addition to paying a $5 million fine, the settlement says the app is banned from offering or marketing to anyone under the age of 18. “NGL marketed its app to kids and teens despite knowing ...