About Summit Police Frequencies
- 4 conventional channels are analog FM, so any scanner can receive them. Enter the frequency and set the tone shown in the table.
- 1 conventional channel uses a digital mode (P25), which needs a scanner that decodes that mode.
- Trunked radio systems that carry law-enforcement traffic here: STARCOM21 Statewide Illinois: 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 Summit, start with the Effingham site of STARCOM21 Statewide Illinois, about 5 miles away. Its control channels: 852.1625, 852.6875, 853.6375 MHz.
- 1 listed entry is marked encrypted. No scanner can decode encrypted audio.
Effingham County channels that also cover Summit
Dispatch
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Effingham County Sheriff Old | Effingham County Sheriff – Dispatch | 154.8600 In 158.9700 | 179.9 PL | FMN | KSH222 |
| Effingham County Sheriff | Operations | 158.9700 | NAC C1A | P25 | KSH222 |
| Effingham County Sheriff | Mobile Extenders | 173.2375 | CSQ | FMN | KSH222 |
| FBI | Operations – Effingham Field Office | 167.4375 | 167.9 PL | FMN | — |
Jails & Corrections
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Effingham County Sheriff | Corrections / Courthouse | 154.8825 In 159.0750 | 703 DPL | FMN | WQNF489 |
STARCOM21 Statewide Illinois
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Effingham County Sheriff | Tactical?/ Travel? | 8327 | 2087 | D |
| Effingham County Sheriff | Travel | 8334 | 208e | D |
1 encrypted talkgroup (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Effingham County Sheriff | Effingham County Sheriff – Dispatch | 8326 | 2086 | D Encrypted |
Nearest trunked radio sites
Distances are measured from the center of Summit.
Effingham · STARCOM21 Statewide Illinois
RFSS 3 · Site 5 (hex 5) · NAC 140 · about 5 mi away
Control 852.1625, 852.6875, 853.6375
Voice 851.6375, 858.4875
Mason · STARCOM21 Statewide Illinois
RFSS 3 · Site 27 (hex 1B) · NAC 143 · about 11 mi away
Control 851.4125, 852.9875, 853.875
Voice 852.4625, 860.8875
Lakewood/Williamsburg Hill · STARCOM21 Statewide Illinois
RFSS 2 · Site 26 (hex 1A) · NAC 148 · about 20 mi away
Control 852.35, 852.875, 853.4
Voice 851.825, 853.975
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
What frequency do the police use in Summit?
We do not have a dispatch channel listed specifically for Summit. County-level dispatch channels in the same county: Effingham County Sheriff 158.9700 MHz (NAC C1A); Effingham County Sheriff 173.2375 MHz (CSQ).