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  2. Plain old telephone service - Wikipedia

    en.wikipedia.org/wiki/Plain_old_telephone_service

    Plain Old Telephone Service (POTS), or Plain Ordinary Telephone System [1], is a retronym for voice-grade telephone service that employs analog signal transmission over copper loops. The term POTS originally stood for Post Office Telephone Service , as early telephone lines in many regions were operated directly by local Post Offices .

  3. List of wireless network technologies - Wikipedia

    en.wikipedia.org/wiki/List_of_wireless_network...

    2G (or 2-G) provides three primary benefits over their predecessors: phone conversations are digitally encrypted; 2G systems are significantly more efficient on the spectrum allowing for far greater mobile phone penetration levels; and 2G introduced data services for mobile, starting with SMS (Short Message Service) plain text-based messages. 2G technologies enable the various mobile phone ...

  4. List of mobile virtual network operators in the United States

    en.wikipedia.org/wiki/List_of_mobile_virtual...

    Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the four major cellular carriers in the country—AT&T Mobility, Boost Mobile, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.

  5. What Is Tether and Is It a Good Investment? - AOL

    www.aol.com/tether-good-investment-030317046.html

    Despite the controversies, new Tether tokens continue being minted as demand continues to increase. Currently, the market cap of USDT is $68.223 billion, up from $4.108 billion in October 2019.

  6. Tether is nearly a decade old—and its books are still a mystery

    www.aol.com/tether-nearly-decade-old-books...

    For premium support please call: 800-290-4726 more ways to reach us

  7. Small Business Phone System: A Guide to Service Types ... - AOL

    www.aol.com/small-business-phone-system-guide...

    Hosted business phone systems have little to no upfront costs. You only need an internet connection and a device, like a mobile phone or computer, to handle incoming and outgoing calls.

  8. JLENS - Wikipedia

    en.wikipedia.org/wiki/JLENS

    The Joint Land Attack Cruise Missile Defense Elevated Netted Sensor System, or JLENS (colloquially, Spy Balloon), [1] was a tethered aerial detection system designed to track boats, ground vehicles, [2] cruise missiles, manned and unmanned aircraft (airborne early warning and control), and other threats [specify].

  9. History of the telephone in the United States - Wikipedia

    en.wikipedia.org/wiki/History_of_the_telephone...

    The telephone played a major communications role in American history from the 1876 publication of its first patent by Alexander Graham Bell onward. In the 20th century the American Telephone and Telegraph Company (AT&T) dominated the telecommunication market as the at times largest company in the world, until it was broken up in 1982 and replaced by a system of competitors.

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