Which radio system allows users to select a talk group with the system automatically selecting the channel to be used?

The trunked radio system is designed to enhance communication efficiency among users by automatically managing the channels within a set of frequencies. In a trunked system, multiple users can share a relatively small number of communication channels. When a user selects a talk group, the system dynamically assigns one of the available channels for that specific group, thereby optimizing channel usage and minimizing congestion.

This capability is particularly useful in scenarios where multiple groups might need to communicate simultaneously but where channel availability is limited. It reduces the need for users to manually find an open channel, streamlining the communication process and ensuring that users can connect quickly and effectively.

In contrast to this, conventional systems operate on fixed channels that do not allow for this level of dynamic channel assignment, while simplex and duplex refer to the method of communication (one-way versus two-way) rather than the channel management technique.