Inversion points for some popular communications devices.
| Manufacturer |
Carrier Frequency |
| Motorola & Selectone |
3.496KHz |
| MX-Com |
3.333KHz |
| MX-Com & Selectone |
3.339KHz |
| MX-Com & Selectone |
3.023KHz |
| Norcomm |
3.107KHz |
| Transcrypt & Selectone |
2.718KHz |
| Selectone |
3.729KHz |
| Selectone |
2.868KHz |
| Selectone |
2.718KHz |
| Selectone |
3.196KHz |
| Selectone |
2.632KHz |
|