The Phone

The First Phone

Mar 10, 1876

http://www.americaslibrary.gov/jb/recon/jb_recon_telephone_1.html

Telephone transmissions

May 2, 1900

http://www.greatachievements.org/?id=3625

Fleming invents the vacuum diode

May 2, 1904

http://www.greatachievements.org/?id=3625

First transcontinental telephone call

May 8, 1919

http://www.greatachievements.org/?id=3625

Switching systems and rotary-dial telephones

May 8, 1920

http://www.greatachievements.org/?id=3625

A Mathematical Theory of Communication

May 10, 1947

North American Numbering Plan

Jul 10, 1947

First phone to combine a ringer and handset

May 10, 1949

Direct long distance calling first available

May 10, 1951

First transatlantic telephone cable

May 10, 1956