Significados de duplex telegraphy en inglés

He brought out duplex telegraphy and suggested a printing telegraph for the use of gold and stock quotations.

This was called duplex telegraphy.

Edison invented duplex telegraphy by which two messages could be sent over the same wire in the same direction at the same time.

In 1842, he discovered, with Dr. Fisher, the principle of duplex telegraphy, and he was also the first to experiment with wireless telegraphy.