About Brentwood Police Frequencies
- 1 conventional channel is analog FM, so any scanner can receive it. Enter the frequency and set the tone shown in the table.
- Trunked radio systems that carry law-enforcement traffic here: Middle Tennessee Regional Trunked Radio System: 2 talkgroups; Middle Tennessee Regional Trunked Radio System: 4 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 Brentwood, start with the Franklin (MTE) site of Tennessee Advanced Communications Network (TACN), about 6 miles away. Its control channels: 855.1625, 855.9375 MHz.
- 4 listed entries are marked encrypted. No scanner can decode encrypted audio.
Brentwood trunked talkgroups
Middle Tennessee Regional Trunked Radio System
2 encrypted talkgroups (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Brentwood Police | Primary | 20040 | 4e48 | D Encrypted |
| Brentwood Police | Brentwood Police – Tactical Channel | 20041 | 4e49 | D Encrypted |
Williamson County channels that also cover Brentwood
Jails & Corrections
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Williamson County Jail | County Jail | 453.6875 In 458.6875 | 136.5 PL | FMN | WNHN698 |
Middle Tennessee Regional Trunked Radio System
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| State and Federal Law Enforcement | US Marshal Service | 2165 | 875 | D |
| State and Federal Law Enforcement | Tennessee Wildlife Resource Agency | 2329 | 919 | D |
2 encrypted talkgroups (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Williamson Sheriff | Williamson Sheriff – Dispatch | 20230 | 4f06 | D Encrypted |
| Williamson/Maury Co - Spring Hill | Williamson/Maury Co – Spring Hill – Dispatch | 20424 | 4fc8 | D Encrypted |
Nearest trunked radio sites
Distances are measured from the center of Brentwood.
Franklin (MTE) · Tennessee Advanced Communications Network (TACN)
RFSS 1 · Site 66 (hex 42) · NAC 2A6 · about 6 mi away
Control 855.1625, 855.9375
Voice 851.775, 852.775, 853.175
Williamson Co Simulcast · Middle Tennessee Regional Trunked Radio System
RFSS 3 · Site 20 (hex 14) · NAC 440 · about 7 mi away
Control 773.13125, 773.88125, 774.63125, 774.90625
Voice 769.11875, 771.10625, 771.48125, 771.83125, 772.13125, 772.38125, 772.58125, 772.78125
Cane Ridge (Antioch) · Tennessee Advanced Communications Network (TACN)
RFSS 1 · Site 29 (hex 1D) · NAC 2A0 · about 8 mi away
Control 769.30625, 774.29375
Voice 769.86875, 770.56875, 770.84375, 771.60625, 772.01875, 772.40625, 772.73125, 773.03125, 773.40625
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.
Common questions
Are Brentwood police talkgroups encrypted?
2 of the 2 talkgroups listed for Brentwood are marked fully or partly encrypted; a scanner cannot decode encrypted audio.