RTTY (Radio Teletype)

RTTY (Radio Teletype) is a communication technology that transmits text messages over radio waves using standardized digital signals. It was historically used by military, news agencies, and amateur radio operators to send typed messages quickly and reliably across long distances. RTTY encodes characters into specific frequency shifts or tones, allowing clear and automated text exchange without voice. Today, it’s largely replaced by more advanced digital modes, but remains a foundational technology in radio communication, appreciated for its simplicity and effectiveness in securely transmitting written information over radio channels.