M17 is a type of radio communication protocol used primarily in amateur radio and digital communications. It is designed to provide efficient and reliable voice and data transmission over radio frequencies. M17 aims to enhance the capabilities of existing digital modes by offering features like encryption, error correction, and support for various audio codecs. The protocol is open-source, allowing developers and enthusiasts to contribute to its improvement and adaptation. M17 is often used in conjunction with software-defined radios (SDRs) and can be integrated into various platforms, making it a versatile choice for amateur radio operators and emergency communication services.