CCIR (selcall)
From Wikipedia, the free encyclopedia
CCIR is a 5-tone calling system used in radio communications systems in some European countries (among them the Swedish Police).
The tone duration has to be 100 milliseconds (± 10 ms).
| Value | Frequency |
|---|---|
| 1 | 1124 Hz |
| 2 | 1197 Hz |
| 3 | 1275 Hz |
| 4 | 1358 Hz |
| 5 | 1446 Hz |
| 6 | 1540 Hz |
| 7 | 1640 Hz |
| 8 | 1747 Hz |
| 9 | 1860 Hz |
| 0 | 1981 Hz |
| Group | 2400 Hz |
| Repeat | 2110 Hz |
