What message is transmitted to the telegraph?

Another improvement, by the famed inventor Thomas Alva Edison (1847-1931) in 1874, was the Quadruplex system, which allowed for four messages to be transmitted simultaneously using the same wire. Use of the telegraph was quickly accepted by people eager for a faster and easier way of sending and receiving information. read more

The electric telegraph is a now outdated communication system that transmitted electric signals over wires from location to location and then translated into a message. The non-electric telegraph was invented by Claude Chappe in 1794. read more