Trunked radio system

• A. Each radio is assigned a fixed frequency
• B. Frequencies are infinite and not managed
• C. Computer controlled system dynamically shares a small number of frequencies
• D. Radios cannot communicate with each other

Answer: (C)

Trunked radio systems maximize capacity by pooling a limited set of frequencies and allocating them to users on demand. A central computer coordinates who can talk on which channel, using a control channel and a database of talk groups to set up each call. This dynamic sharing allows many users to communicate without needing a dedicated frequency for every radio, which is why this option is the best description.

The other ideas don’t fit trunking: dedicating a fixed frequency to each radio would waste spectrum and isn’t how trunked systems operate; assuming there are infinite frequencies with no management contradicts how real-world radio spectrum is limited and controlled; and saying radios can’t communicate is simply incorrect for any functional radio system.