Telegraph wires are thin metal wires used to transmit electrical signals over long distances. They were a key component of the telegraph system, which allowed for rapid communication before the advent of modern technologies like the telephone and the internet. The wires carry electrical impulses that represent messages, enabling people to send information quickly. Typically made of copper or iron, telegraph wires are strung between tall poles, known as telegraph poles. The system relies on a series of telegraph stations that receive and send messages, making it possible to connect distant locations. This innovation revolutionized communication in the 19th century.