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  2. Emergency Alert System - Wikipedia

    en.wikipedia.org/wiki/Emergency_Alert_System

    Emergency Broadcast System, Local Access Alert. The Emergency Alert System ( EAS) is a national warning system in the United States designed to allow authorized officials to broadcast emergency alerts and warning messages to the public via cable, satellite and broadcast television and AM, FM and satellite radio.

  3. Phreaking - Wikipedia

    en.wikipedia.org/wiki/Phreaking

    Phreaking is a slang term coined to describe the activity of a culture of people who study, experiment with, or explore telecommunication systems, such as equipment and systems connected to public telephone networks. [ 1] The term phreak is a sensational spelling of the word freak with the ph- from phone, and may also refer to the use of ...

  4. Tones and I - Wikipedia

    en.wikipedia.org/wiki/Tones_and_I

    Toni Watson, known professionally as Tones and I, is an Australian singer, songwriter, and record producer. She is best known for her breakout single "Dance Monkey", which reached number one in over 30 countries including her home country Australia. In 2019–20, "Dance Monkey" completed 24 weeks at number one on the Australian singles chart ...

  5. Nokia tune - Wikipedia

    en.wikipedia.org/wiki/Nokia_tune

    The Nokia tune is a phrase from a composition for solo guitar, Gran Vals, composed in 1902 by the Spanish classical guitarist and composer Francisco Tárrega. [1] It has been associated with Finnish corporation Nokia since the 1990s, becoming the first identifiable musical ringtone on a mobile phone; Nokia selected an excerpt to be used as its default ringtone.

  6. Busy signal - Wikipedia

    en.wikipedia.org/wiki/Busy_signal

    See media help. A busy signal (or busy tone or engaged tone) in telephony is an audible call-progress tone or audible signal to the calling party that indicates failure to complete the requested connection of that particular telephone call . The busy signal has become less common in the past few decades due to the prevalence of call waiting and ...

  7. Tone indicator - Wikipedia

    en.wikipedia.org/wiki/Tone_indicator

    Tone indicator. A tone indicator or tone tag is a symbol attached to a sentence or message sent in a textual form, such as over the internet, to explicitly state the intonation or intent of the message, especially when it may be otherwise ambiguous. Tone indicators start with a forward slash ( /), followed by a short series of letters, usually ...

  8. Call-progress tone - Wikipedia

    en.wikipedia.org/wiki/Call-progress_tone

    In telephony, call progress tones are audible tones that provide an indication of the status of a telephone call to the user. The tones are generated by a central office or a private branch exchange (PBX) to the calling party . Telecommunication equipment such as fax machines and modems are designed to recognize certain tones, such as dial tone ...

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