Note: This is a listing of deprecated systems. These systems are either no longer in use or have been superceded by another system.
| System Name | Type | Flavor | City | County | Updated |
|---|---|---|---|---|---|
| Dartmouth College | LTR | Standard | Hanover | Grafton | 2022-11-02 |
| Industrial Communications and Electronics (Waltham) | Motorola | Type II | Waltham | Multi-County [2] | 2020-04-27 |
| MaineStream Solutions | NXDN | Icom IDAS Type D | Falmouth | Multi-County [9] | 2023-11-19 |