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Telephone Technology Changes through Time

Telephone Technology

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Page 1: Telephone Technology

Telephone TechnologyChanges through Time

Page 2: Telephone Technology

1920’s

Page 3: Telephone Technology

1925

Page 4: Telephone Technology

1950

Page 5: Telephone Technology

1963

Page 6: Telephone Technology

1970’s

Page 7: Telephone Technology
Page 8: Telephone Technology

1980’s

Page 9: Telephone Technology

2010

Page 10: Telephone Technology

2010