About Sims Police Frequencies
- 4 conventional channels use 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): 6 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 Sims, start with the National City site of Michigan's Public Safety Communications System (MPSCS), about 15 miles away. Its control channels: 853.475, 853.975 MHz.
- 4 listed entries are marked encrypted. No scanner can decode encrypted audio.
Arenac County channels that also cover Sims
Jails & Corrections
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Arenac County Jail | County Jail Wide | 453.3000 In 458.3000 | CC 10 · TG 1 · SL 1 | DMR Encrypted | WRPU574 |
| Arenac County Jail | County Jail Administration | 453.3000 In 458.3000 | CC 10 · TG 2 · SL 2 | DMR Encrypted | WRPU574 |
| Arenac County Jail | County Jail T-A 1 Simplex | 453.3000 | CC 10 · TG 3 · SL 1 | DMR Encrypted | WRPU574 |
| Arenac County Jail | County Jail T-A 2 Simplex | 453.3000 | CC 10 · TG 4 · SL 2 | DMR Encrypted | WRPU574 |
Michigan's Public Safety Communications System (MPSCS)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Arenac County Sheriff | Arenac County Sheriff – Dispatch | 1107 | 453 | D |
| Arenac County Sheriff | Tribal Police | 1533 | 5fd | D |
| Arenac County Sheriff | County Narcotics Enforcement | 1163 | 48b | D |
| Arenac County Sheriff | Sheriff Proprietary | 1571 | 623 | D |
| Arenac County Sheriff | Sheriff Proprietary | 1572 | 624 | D |
| Arenac County Sheriff | AuGres Sims Police Proprietary | 1573 | 625 | D |
Nearest trunked radio sites
Distances are measured from the center of Sims.
National City · Michigan's Public Safety Communications System (MPSCS)
RFSS 1 · Site 13 (hex D) · NAC 795 · about 15 mi away
Control 853.475, 853.975
Voice 851.125, 851.975, 852.975, 856.2875, 856.3125, 858.3125, 859.3125, 860.3125
Sterling · Michigan's Public Safety Communications System (MPSCS)
RFSS 1 · Site 11 (hex B) · NAC 794 · about 25 mi away
Control 853.3875, 853.875
Voice 851.4875, 851.9625, 852.125, 852.4375
Elkton · Michigan's Public Safety Communications System (MPSCS)
RFSS 2 · Site 11 (hex B) · NAC 795 · about 29 mi away
Control 853.5875, 853.8375
Voice 851.2, 852.3625, 852.8875, 861.1125, 861.2375, 861.5375, 862.3125
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.