What is an example of a telegraph?

An example of a telegraph is the Morse telegraph, which uses a system of dots and dashes to transmit messages over long distances through electrical signals. Developed by Samuel Morse and Alfred Vail in the 1830s, this system allowed for rapid communication by encoding text into a series of short and long signals, which could be sent via wires. The Morse telegraph revolutionized communication in the 19th century, enabling faster exchange of information than ever before.