It eventually expanded to more than 620 miles of coaxial cable transmission lines in many cities. The system called was called Gegensehn-Fernsprechanlagen, or 'visual telephone system.' Initially, the connection between Berlin and Leipzig - about 100 miles apart - using a coaxial cable. 1936: Georg Schubert develops telephonyĭuring the 1936 summer Olympics in Germany, Georg Schubert, a German inventor, developed a prototype of modern video telephony that could be used for commercial purposes. However, lingering effects of the Great Depression stalled the development of video communications. In 1931, AT&T demonstrated a two-way video communication session between two AT&T offices in Manhattan where, unlike the Hoover demonstration, both parties could see each other - a first. Viewers in a New York auditorium could see Hoover, but he could not see them. It broadcasted a live moving image of then-Commerce Secretary Hoover from the White House to New York - a distance of 200 miles. On April 7, 1927, AT&T Bell Telephone Laboratories created a working TV communication complex. The first stable and operational TV cameras entered the market in the second half of the 1920s, setting the stage for video communication. The problem wasn't the transmission technology - it was the cameras. Download this entire guide for FREE now! 1920s: AT&T's Bell Telephone Laboratories video call with Herbert HooverĪudio transmission was relatively simple technologically, but video transmission was not.

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