About Duplain Police Frequencies
- 1 conventional channel uses a digital mode (DMR), which needs a scanner that decodes that mode.
- Trunked radio systems that carry law-enforcement traffic here: Michigan's Public Safety Communications System (MPSCS): 11 talkgroups. A trunking scanner is required, and it must support the system type shown.
- To follow a trunked system, program a control channel first. For Duplain, start with the Oak Grove site of Michigan's Public Safety Communications System (MPSCS), about 10 miles away. Its control channels: 853.125, 853.7125 MHz.
- 5 listed entries are marked encrypted. No scanner can decode encrypted audio.
Clinton County channels that also cover Duplain
Jails & Corrections
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Clinton County Sheriff | Clinton County Corrections | 460.2500 In 465.2500 | DMR | WQVD303 |
Michigan's Public Safety Communications System (MPSCS)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Clinton County Law Enforcement | Clinton County Law Enforcement – Dispatch | 1191 | 4a7 | D |
| Clinton County Law Enforcement | County Narcotics | 1164 | 48c | D |
| Clinton County Law Enforcement | Bath Twp Police Administration | 298 | 12a | D |
| Clinton County Law Enforcement | DeWitt Township Administration | 309 | 135 | D |
| Clinton County Law Enforcement | Police Administration | 328 | 148 | D |
| Clinton County Law Enforcement | Sheriff Administration | 337 | 151 | D |
5 encrypted talkgroups (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Clinton County Law Enforcement | Clinton County Law Enforcement – Tactical Channel | 331 | 14b | D Encrypted |
| Clinton County Law Enforcement | Clinton County Law Enforcement – Tactical Channel | 332 | 14c | D Encrypted |
| Clinton County Law Enforcement | Clinton County Law Enforcement – Tactical Channel | 333 | 14d | D Encrypted |
| Clinton County Law Enforcement | Clinton County Law Enforcement – Tactical Channel | 1193 | 4a9 | D Encrypted |
| Clinton County Law Enforcement | LEIN | 330 | 14a | D Encrypted |
Nearest trunked radio sites
Distances are measured from the center of Duplain.
Oak Grove · Michigan's Public Safety Communications System (MPSCS)
RFSS 1 · Site 32 (hex 20) · about 10 mi away
Control 853.125, 853.7125
Voice 851.2, 852.075, 855.225
Clinton County Simulcast · Michigan's Public Safety Communications System (MPSCS)
RFSS 1 · Site 28 (hex 1C) · NAC 798 · about 12 mi away
Control 852.55, 853.0875, 853.5875, 853.8375
Voice 771.25265, 772.93125, 854.7375, 856.9625, 857.2125, 857.9625
Rainbow Lake · Michigan's Public Safety Communications System (MPSCS)
RFSS 1 · Site 29 (hex 1D) · NAC 798 · about 14 mi away
Control 853.0625, 853.7875
Voice 769.90625, 773.28125, 851.9875, 854.0375, 854.5375
What do these numbers mean?
- Control channel
- The frequency your scanner listens to first. It tells the scanner where each voice call is happening, so program it before anything else.
- Voice
- The other frequencies the site uses for calls. A trunking scanner follows them automatically once it has the control channel.
- Site
- One tower location of the system. Scanners show the number in decimal or hex, so both are listed.
- RFSS (Radio Frequency Sub-System)
- A group of sites run by the same controller. Large Project 25 systems can have several.
- NAC (Network Access Code)
- A hex code the site transmits. Your scanner can use it to ignore other systems on the same frequency.
- Talkgroup
- A virtual channel on a trunked system, such as one agency’s dispatch. Programming uses the decimal or hex number, depending on your scanner.