| 2271 | 8df | D | 74COM | Countywide Common (Mutual Aid all agencies) | Interop |
| 2273 | 8e1 | D | 74OPS1A | Western On-Scene Interoperability - All Agencies | Interop |
| 2274 | 8e2 | D | 74OPS2A | Northern On-Scene Interoperability - All Agencies | Interop |
| 2697 | a89 | D | 74OPS3A | Central On-Scene Interoperability - All Agencies | Interop |
| 2698 | a8a | D | 74OPS4A | Downriver On-Scene Interoperability - All Agencies | Interop |
| 12112 | 2f50 | D | 74OPS1B | Western On-Scene Interoperability - All Agencies | Interop |
| 12113 | 2f51 | D | 74OPS2B | Northern On-Scene Interoperability - All Agencies | Interop |
| 12114 | 2f52 | D | 74OPS3B | Central On-Scene Interoperability - All Agencies | Interop |
| 12115 | 2f53 | D | 74OPS3C | Central On-Scene Interoperability - All Agencies | Interop |
| 12116 | 2f54 | D | 74OPS3D | On-Scene Interoperability - All Agencies (TRI Hospital EMS to County Sheriff Dispatch) | Interop |
| 12117 | 2f55 | D | 74OPS4B | Downriver On-Scene Interoperability - All Agencies | Interop |
| 12119 | 2f57 | D | 74DISP | Countywide PSAP-to-PSAP | Interop |
