Understanding 2 Tone Calling (Fire Tone Out)

Short description : This video provides a short introduction to two tone or “fire tone out” (FTO) calling and how it is used in public safely radio applications. Test and Measurement Fundamentals Playlist: https://www.youtube.com/playlist?list=PLKxVoO5jUTlvsVtDcqrVn0ybqBVlLj2z8 Timeline: 00:00 Introduction 00:14 About fire alerts 01:05 About 2-tone calling (fire tone out) 02:03 Tone frequencies and durations 03:10 How tones are interpreted 04:09 Testing 2 tone calling / fire tone out 05:27 Summary