| Manufacturer | FA1 | FA2 | FA3 |
| N/A | X | | |
| Cimarron Technologies | X | | |
| Con-Space | X | | |
| Critical RF | X | | X |
| dbSpectra | X | X | X |
| DX Radio Systems | X | | X |
| Freelinc | X | | |
| Harris | X | X | X |
| ICOP Digital, Inc. | X | | X |
| Kenwood | X | | X |
| Kingston | | | X |
| Klein Electronics | X | | X |
| Laird Technologies | X | | X |
| Midland Radio Corporation | X | | X |
| Motorola | X | | |
| Omnicron Electronics | | X | X |
| Panasonic | X | X | X |
| Piratecom | X | | |
| Power Products Limited | X | | X |
| Pryme | X | | |
|