CCIR (selcall)
There are many types and formats of CCIR Selcall. For example, CCIR 493-4 is a standard format for HF Selcall for Land Mobile applications.[1] CCIR (Consultative Committee on International Radio) functions have largely been taken over by ITU-R. One common type of CCIR selcall used in VHF and UHF FM two-way radio communications, is a 5-tone selective calling system mainly found in some European countries and used by the Swedish Police and the Turkish Police.
The tone duration of a 5 tone CCIR selcall is 100 milliseconds (± 10 ms) and the tones are transmitted sequentially.
| 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 (A) | 2400 Hz |
| Repeat (E) | 2110 Hz |
References
[edit]- CCIR (2011-10-10). "Selcall". CCIR.