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  2. AT&T Switching Center - Wikipedia

    en.wikipedia.org/wiki/AT&T_Switching_Center

    The AT&T Madison Complex Tandem Office is a 17-story, 79 m (259 ft) building in Los Angeles, California, completed in 1961. With its microwave tower, used through 1993, bringing the overall height to 137 m (449 ft), it is the 47th tallest building in Los Angeles.

  3. AT&T Wireless Services - Wikipedia

    en.wikipedia.org/wiki/AT&T_Wireless_Services

    AT&T Wireless Services, Inc., formerly part of AT&T Corporation, was a wireless telephone carrier founded in 1987 in the United States, based in Redmond, Washington, and later traded on the New York Stock Exchange under the stock symbol "AWE", as a separate entity from its former parent.

  4. Cell site - Wikipedia

    en.wikipedia.org/wiki/Cell_site

    Cellular lattice tower A cell tower in Peristeri, Greece. A cell site, cell phone tower, cell base tower, or cellular base station is a cellular-enabled mobile device site where antennas and electronic communications equipment are placed (typically on a radio mast, tower, or other raised structure) to create a cell, or adjacent cells, in a cellular network.

  5. AT&T Mobility - Wikipedia

    en.wikipedia.org/wiki/AT&T_Mobility

    AT&T Prepaid (stylized AT&T PREPAID; formerly GoPhone) is a prepaid mobile phone service from AT&T Mobility. The GoPhone name and product were originally conceived and implemented by McCaw Cellular by its founder Craig McCaw and first used in commerce in 1987 by his company.

  6. Mobile Telephone Switching Office - Wikipedia

    en.wikipedia.org/wiki/Mobile_Telephone_Switching...

    When the MSC gets the call, it checks its database for the location of the phone. Then it picks a frequency pair the phone will use in that cell to take the call. The MSC communicates with the phone over the control channel to tell it which frequencies to use, and once the phone and the tower switch on those frequencies, the call is connected.

  7. List of tallest structures in the United States by height

    en.wikipedia.org/wiki/List_of_tallest_structures...

    American Towers Tower Riverview-33569 Riverview, Florida Guyed Mast 477.6 m KBSI TV Mast: Cape Girardeau, Missouri: Guyed Mast 477.1 m Media General Tower Saint Ansgar Saint Ansgar, Iowa: Guyed Mast 477 m Red River Broadcast Tower Salem Salem, South Dakota: Guyed Mast 476.4 m Hearst-Argyle Television Tower Oklahoma City, Oklahoma Guyed Mast 475.6 m

  8. Ohio Bell - Wikipedia

    en.wikipedia.org/wiki/Ohio_Bell

    The Ohio Bell Telephone Company, now doing business as AT&T Ohio, is the Bell Operating Company serving most of Ohio and parts of West Virginia. It is a wholly owned subsidiary of AT&T . Its headquarters is the Ohio Bell Building at 750 Huron Road, Cleveland , Ohio , and formerly had a secondary headquarters at 150 East Gay Street, Columbus ...

  9. Mobile cell sites - Wikipedia

    en.wikipedia.org/wiki/Mobile_cell_sites

    Mobile cell sites are infrastructures transportable on trucks, allowing fast and easy installation in restricted spaces. Their use is strategic for the rapid expansion of cellular networks putting into service point-to-point radio connections as well as supporting sudden increases in mobile traffic in the case of extraordinary events (trade ...