Selective calling tones
A rapid sequence of musical tones that calls one specific radio or group.
ModeSelective calling tones
FamilyRadio signaling
Audio exampleComing
What does it sound like?
Plate 57Radio signaling
A quick run of musical notes, like 'da-da-da-da-da'.
Field marksA quick sequence of tones, often fiveSent at the start of a call
Who uses it?
Businesses, taxi and transport fleets, emergency services (common in Europe) and some repeaters.
Where and when can I hear it?
VHF/UHF FM channels, and some HF networks.
Easily confused with
- Touch-tone (DTMF): DTMF plays two tones at once
- MDC-1200 radio ID burst: MDC-1200 is a buzzy data burst