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1966 - electronic blackboard-by-wire teaching system transmits voice and handwriting over telephone lines


CD 1967056 E&MP134.207


October 19, 1966


An electronic “blackboard-by-wire” teaching system today transmitted voice communications and handwriting over telephone lines for long distance illustrated lectures at a demonstration jointly sponsored by Purdue University and General Telephone & Electronics Corporation.

The new system, introduced last May, enables students (above) to receive course material with graphic material being presented on a classroom TV monitor.

The instructor’s voice is heard through a classroom speaker system.

The handwritten information remains on the TV monitor until the instructor presses an “erase” button on his console.

Students can ask questions or comment on the lecture by pressing a “question” button in the classroom.

The instructor then activates a return audio circuit which permits the students to talk with the transmitting location.

Up to six remote receiving locations can be operated from one transmitting console.

The TV-display feature makes the system a convenient teaching aid which can be used interchangeably with existing TV equipment.

The system was designed and developed in Beford, Mass., by the Commercial Electronics Division of Sylvania Products Inc., a GT&E subsidiary. 

Original Caption by Science Service
General Telephone & Electronics Corporation

National Museum of American History


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