Selcall (
selective calling) is a type of
squelch protocol used in radio communications systems, in which transmissions are preceded by a brief burst of sequential audio tones. Receivers that are set to respond to the transmitted tone sequence will open their squelch, while others will remain muted.Motorola's name is Select 5 in sales brochures for obsolete equipment marketed in Europe such as Syntor mobiles, Syntor X mobiles, Mitrek mobiles, Mostar mobiles, and Maxar mobiles.Selcall is a signalling protocol mainly in use in Europe and Asia. Still being incorporated in radioequipment marketed in those areas.
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