System users include: Tuscola County Sheriff, Tuscola County Fire, Tuscola County EMS, Tuscola County Emergency Management, Michigan State Police Post 39, and other local public safety agencies.

851.2625 is the control channel for the Caro site.
852.2625 is the home channel for the Caro site.
854.2875 is the control channel for the Mayville site.
853.2625 is the home channel for the Mayville site.

Both control channels and home channels do carry some voice transmissions.

The best method of scanning this system, other than using the LTRUNK program, is to use two scanners in conventional mode to monitor one site as follows:
- Program one scanner with all confirmed frequencies except the control channel and home channel.
- Do Not Use Delay on ANY of these frequencies
- Program a second scanner with the control channel and home channel.
- Do Not Use Delay on EITHER of these frequencies
 - Program the home channel as a PRIORITY channel
- Manually select/hold on the control channel and engage PRIORITY function of scanner
- You will hear constant the unsquelch on the control channel, but if either frequency carries a transmission, you will hear the conversation.