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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.
Bell Communications Around the Globe is a 1961 sculptural relief by Anthony Heinsbergen, installed on the west side of an AT&T switching center at 420 South Grand Avenue in Los Angeles, California. [ 1 ] [ 2 ] [ 3 ] According to the Los Angeles Times , the mural depicts the "globe linked by undersea telephone cables and satellite relays that ...
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811 Tenth Avenue (also called the AT&T Switching Center) is a 370-foot-tall (110 m) skyscraper in the Hell's Kitchen neighborhood of Manhattan in New York City. [1] It was designed by Kahn & Jacobs and completed in 1964, occupying the full block of 10th Avenue 's western side between West 53rd and 54th Streets .
PSTN network topology is the switching network topology of a telephone network connected to the public switched telephone network (PSTN).. In the United States and Canada, the Bell System network topology was the switching system hierarchy implemented and operated from c. 1930 to the 1980s for the purpose of integrating the diverse array of local telephone companies and telephone numbering ...
Room 641A is a telecommunication interception facility operated by AT&T for the U.S. National Security Agency, as part of its warrantless surveillance program as authorized by the Patriot Act. The facility commenced operations in 2003 and its purpose was publicly revealed by AT&T technician Mark Klein in 2006. [1] [2]
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