See the WIKI for additional information (including legacy frequencies)
Frequencies
Illinois State Toll Highway Authority (ISTHA)
Mutual Aid
UHF National Interoperability (Repeaters located at all multiple sites, see the WIKI) 453.2125, 453.4625, 453.71725, 458.8625 (all 156.7) WQJE848
Patrol
| STARCOM21 Statewide Illinois Project 25 Phase II | Main Communications system |
| Frequency | License | Type | Tone | Alpha Tag | Description | Mode | Tag |
|---|---|---|---|---|---|---|---|
| 854.9875 | KQM631 | RM | 043 DPL | ISTHA F-1 | North: Belvidere, Park Ridge, Gurnee (Boone County) {input D114} | FMN | Law Tac |
| 855.2375 | RM | 043 DPL | ISTHA F-2 | North: Elgin, Deerfield, South Beloit {input D043} | FMN | Law Tac | |
| 855.4875 | RM | 165 DPL | ISTHA F-3 | South: Rochelle, Alsip, Naperville {input D174} | FMN | Law Tac | |
| 855.7375 | RM | 165 DPL | ISTHA F-4 | South: DeKalb, Dixon, Markham, Westchester {input D174} | FMN | Law Tac | |
| 855.9625 | KQM631 | RM | 043 DPL | ISTHA F-5 | North: Arlington Heights (along I-90) {input D114} | FMN | Law Tac |
| 855.9625 | KQM631 | RM | 245 DPL | ISTHA F-6 | unknown area {input D306} | FMN | Law Tac |
| 855.9625 | KQM631 | RM | 263 DPL | ISTHA F-7 | South: Lisle {input D331} | FMN | Law Tac |
| 855.9625 | KQM631 | M | 251 DPL | ISTHA F-8 | Car-to-Car | FMN | Law Tac |
| 866.1625 | KQM631 | RM | 023 DPL | ISTHA F-9 | North: Lisle {input same} | FMN | Law Tac |
| 866.1625 | WPXD331 | RM | 023 DPL | ISTHA DwnrsGrove | Downers Grove (Wide Area range) | FMN | Law Tac |
| 866.1625 | WQBU735 | RM | 023 DPL | ISTHA Lisle Ptrl | Lisle Patrol | FMN | Law Tac |
Maintenance
| Frequency | License | Type | Tone | Alpha Tag | Description | Mode | Tag |
|---|---|---|---|---|---|---|---|
| 855.9875 | WQBB432 | RM | 364 DPL | ITHA F1 | North: Belvidere, Gurnee, Park Ridge (@ Belvidere, Boone Co) {input DCS 412} | FMN | Public Works |
| 856.2375 | KSG358 | RM | 364 DPL | ITHA F2 | North: Deerfield, Elgin, South Beloit {input DCS 412} | FMN | Public Works |
| 811.4875 | KSN40 | F | 412 DPL | ITHA (F2) | fixed input base to F-3 | FMN | Public Works |
| 856.4875 | KUO990 | RM | 423 DPL | ITHA F3 | South: Alsip, Naperville, Rochelle {input DCS 465} | FMN | Public Works |
| 856.7375 | KUO988 | RM | 423 DPL | ITHA F4 | South: DeKalb, Dixon, Markham, Westchester {input DCS 465} | FMN | Public Works |
| 856.9875 | WPSR815 | RM | 364 DPL | ITHA F5 | North: Alington Heights {input DCS 412} | FMN | Public Works |
| 856.9875 | WPSR815 | RM | 532 DPL | ITHA F6 | unknown location {input DCS 624} | FMN | Public Works |
| 856.9875 | WPSR815 | RM | 662 DPL | ITHA F7 | South: Lisle {input DCS 703} | FMN | Public Works |
| 856.9875 | WPSR815 | M | 723 DPL | ITHA F8 U2U | Unit-to-Unit [F-8] | FMN | Public Works |
| 868.5125 | WPXD331 | RM | 023 DPL | ITHA DGrove | Downers Grove | FMN | Public Works |
| 868.5125 | WQBU735 | RM | 023 DPL | ITHA Lisle | Lisle | FMN | Public Works |
| 914.900 | F | ITHA I-PASS | I-PASS Transponder Data (Chicago) | Telm | Data |