Remember this advance in telegraphy? In the summer of 1932, the Telex Service was introduced in Great Britain for administrative use by the British post office. A few months later, it was also available for public use. As the decade progressed, Telex service expanded through North America and Europe, and the German variant proved to be most viable.
Telex machines helped automate the telegraphic process. The earliest models employed telephone-style rotary dialing to allow teletype machines to interface with each other. A Telex advantage was the high-speed, guaranteed communication between two parties – the exchange of answerback codes between the two machines served as a guarantee of receipt. Telex machines are still widely used today by central governments of some developing countries. Recently, the device achieved a measure of pop-culture visibility via allusion in the Radiohead song "Planet Telex."