Videotelephony as a concept began to materialize shortly after the telephone was patented in 1876, and its history is closely connected to that of the telephone. See more

In early 1936, the first public video telephone service, Germany's Gegensehn-Fernsprechanlagen (visual telephone system), was … See more

AT&T developed a refined Picturephone throughout the late 1960s, resulting in the "Mod II" (Model No. 2), which served as the basis for AT&T's launch of the first true video conferencing … See more

This time period saw the research, development and commercial roll-out of what would become powerful video compression and … See more

In the United States, AT&T's Bell Labs conducted extensive research and development of videophones, eventually leading to public … See more

Beginning in the late 1960s, several countries worldwide sought to compete with AT&T's advanced development of its Picturephone service in the United States. However such projects were research and capital intensive, and fraught with difficulties in being … See more

Significant improvements in video call quality of service for the deaf occurred in the United States in 2003 when Sorenson Media Inc. (formerly … See more