This book is a guide to the YSF (Yaesu System Fusion) digital voice mode. It will help you to become familiar with the complex terminology used by the YSF crowd, purchase and program a ‘Fusion’ radio, and make your first few calls. It also includes sections on how to configure and use a YSF hotspot, use a Fusion repeater, and access Wires-X ‘rooms’ and reflectors. The book takes a practical approach, providing the information you need to get started with this exciting digital voice technology. Before you know it, you will be able to talk with amateur radio operators all over the world.