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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 29th tallest building in Los Angeles.

  3. 811 Tenth Avenue - Wikipedia

    en.wikipedia.org/wiki/811_Tenth_Avenue

    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 .

  4. Bell Communications Around the Globe - Wikipedia

    en.wikipedia.org/wiki/Bell_Communications_Around...

    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 ...

  5. No. 4 Electronic Switching System - Wikipedia

    en.wikipedia.org/wiki/No._4_Electronic_Switching...

    AT&T Long Distance was the primary customer for the switch. Driving development from the customer's perspective was AT&T VP Billy Oliver. [4] Previous tandem switching systems, primarily the No. 4 Crossbar switch, used analog voice signaling. The decision to switch in a digital voice format was controversial at the time, both from a technical ...

  6. Southwestern Bell - Wikipedia

    en.wikipedia.org/wiki/Southwestern_Bell

    Missouri and Kansas Telephone Company logo, 1899-1920 1897 map of service area Southwestern Bell Telephone Bill, 1984 Southwestern Bell logo, 1921–1939 Southwestern Bell logo, 1939–1964

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  8. 33 Thomas Street - Wikipedia

    en.wikipedia.org/wiki/33_Thomas_Street

    The building was a core part of the AT&T Long Lines Department, housing solid-state switching equipment that required tight security and ample space. The Long Lines Department became AT&T Communications in 1984 after the Bell System divestiture. The AT&T Long Lines Building is now commonly known by its street address, 33 Thomas Street. [3]

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    related to: at&t switching center locations zip code 77459 county clerk fort worth