About Trio Police Frequencies
- 2 conventional channels are analog FM, so any scanner can receive them. Enter the frequency and set the tone shown in the table.
- Trunked radio systems that carry law-enforcement traffic here: Federal Correctional Institution Williamsburg: 9 talkgroups; Palmetto 800: 3 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 Trio, start with the Primary site of Federal Correctional Institution Williamsburg, about 13 miles away. Its control channels: 407.0125, 408.25, 409.0125 MHz.
- 1 listed entry is marked encrypted. No scanner can decode encrypted audio.
Williamsburg County channels that also cover Trio
Talk-around & Car-to-Car
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Williamsburg County Sheriff | Regional PDs | 155.0100 | 167.9 PL | FM | — |
| Williamsburg County Sheriff | Williamsburg Co. SD | 155.3100 In 158.8950 | 167.9 PL | FM | WPUP323 |
Federal Correctional Institution Williamsburg
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| All | Fleetwide Announcement | 16 | 10 | D |
| All | Operations | 32 | 20 | D |
| All | Operations | 48 | 30 | D |
| All | All – Corrections | 64 | 40 | D |
| All | All – Corrections | 80 | 50 | D |
| All | All – Corrections | 96 | 60 | D |
| All | All – Corrections | 112 | 70 | D |
| All | All – Corrections | 128 | 80 | D |
| All | All – Corrections | 144 | 90 | D |
Palmetto 800
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Williamsburg County Sheriff | Williamsburg County Sheriff – Tactical Channel | 8001 | 1f41 | D |
| Williamsburg County Sheriff | Law Tactical | 8322 | 2082 | D |
1 encrypted talkgroup (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Williamsburg County Sheriff | Williamsburg County Sheriff – Dispatch | 8002 | 1f42 | D Encrypted |
Nearest trunked radio sites
Distances are measured from the center of Trio.
Primary · Federal Correctional Institution Williamsburg
Site 1 (hex 1) · about 13 mi away
Control 407.0125, 408.25, 409.0125, 409.4125
Voice 410.2125
Kingstree · Palmetto 800
RFSS 1 · Site 55 (hex 37) · NAC 1D5 · about 17 mi away
Control 853.2125, 853.8375
Voice 851.825, 852.1875, 852.8625, 853.5625, 856.3625
Georgetown County Simulcast · Palmetto 800
RFSS 1 · Site 22 (hex 16) · NAC 1D5 · about 21 mi away
Control 853.075, 853.2375, 853.35, 853.6875
Voice 851.075, 851.45, 851.625, 852.125, 852.55, 852.8
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.