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  2. Bell System Practices - Wikipedia

    The Bell System Practices ( BSPs) is a compilation of technical publications which describes the best methods of engineering, constructing, installing, and maintaining the telephone plant of the Bell System under direction of AT&T and Bell Telephone Laboratories. [1]

  3. Model 500 telephone - Wikipedia

    The Western Electric model 500 telephone series was the standard domestic desk telephone set issued by the Bell System in North America from 1950 through the 1984 Bell System divestiture. Millions of model 500-series phones were produced and were present in most homes in North America.

  4. AT&T Archives: What is the Bell System? - YouTube

    For more from the AT&T Archives, see Bell System, which in 1976 employed nearly one million people at...