The Call Tones feature of a two-way radio provides the user with a facility to choose from a range of available call tones and set one as a default call tone for a particular group or person. It helps the other members of the group identify the caller uniquely.
Call Tones allows the user to broadcast a tone to other members in the group to alert them that someone from the group wants to communicate with them. It helps get their attention.
This feature is analogous to the set call tone for a particular caller in mobile phones which helps us to identify the caller by the unique ring.