The method of sending message by the teleprinter?

The method of sending messages by the teleprinter is called "telex". Teleprinter machines are used to send and receive messages over long distances through a network of interconnected telex exchanges. The messages are sent by typing them on a keyboard, and they are received by printing them out on a paper tape. Telex was widely used for business and official communication in the 20th century, before being replaced by modern electronic communication methods such as email and instant messaging.