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1937
1939
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1938

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Kellogg 700
Kellogg 700
Kellogg Switchboard and Supply
Crossbar switching introduced
Crossbar switching introduced
PDF: AT&T Annual Report, 1938
AT&T Annual Report, 1938
Video: The Voice of the City (Operators)
The Voice of the City (Operators)
National Federation of Telephone Workers (NFTW) formed
National Federation of Telephone Workers (NFTW) formed
PDF: The Story of Western Electric
The Story of Western Electric
Video: Operator! 1938 video profiling operators.
Operator! 1938 video profiling operators.
Coaxial cable enables broadband
Coaxial cable enables broadband