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Wall mounted telephone
Source In 1920, Elektrisk Bureau Kristiania, Norway invented the wall mounted telephone. It was a general purpose device. -
The Bell System
[Source](www.telephonymusuem.com) In 1921, the Bell System entered the market. The first public dial office in Dallas opened. -
the 1st two-way conversation across the Atlantic Ocean
Source In 1926, the 1st two-way conversation across the Atlantic Ocean took place. The Bell Labratories and the British Post Office helped engineer this phone call. -
Commercial telephone service
Source In 1927, commercial telephone service began between New York and London. Over the next several years, telephone service spread throughout North America and Europe. -
Telephone lines
Source In the year of 1927, the Bell System sent live TV images to the President Herbert Hoover and the Secretary of Commerce over telephone lines from Washingto D.C. to an auditorium in Manhattan. -
the SS Leviathan
Source The SS Leviathan became the 1st ocean liner to offer radio telephone service to its passengers and crew -
Broadband Coaxial Cable
Source Lloyd Espenchied and Herman Affel tried to get a patent for the broadband coaxial cable which is the first broadband transmission medium. -
New telephone feature
Source In 1920, telephones could be placed anywhere in a home. Most people kept their telephones in the kitchen or master bedroom.
