Trunk - A bank of frequencies designed to provide efficient communications with
minimal radio congestion.
Resource – Numerical frequency stored in a trunk.
Subscriber Unit – A radio registered in the trunked system.
Talkgroup - A talkgroup is a segregation of system users into specific
communication groups. Our radios are capable of being programmed with from 16
to as many as 512 talkgroups (communication channels). Talkgroups have names or
abbreviations, which appear on the radio display.
To make it easier to understand, a talkgroup can be compared to a channel.
Zone – Group of conventional channels and/or talkgroups, grouped together for a
specific purpose.
Conventional – Single common frequency used to transmit and receive.
Side System – A group of conventional point to point frequencies utilized by the
fire service for various fireground operations.
Mercer County Public Safety Radio System
Common Terminology
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