S05a
| Enigma ID | S05a |
| Name | Rapid Dots (OLX) |
| Frequencies | |
| Status | Inactive |
| Voice | Female, automated |
| Emission mode | AM |
| Location |
Czechoslovakia
|
| Activity pages |
S05a was operated by Czechoslovak State Security under an ITU-registered callsign "OLX" (though officially assigned to ČTK, the press agency) and allocated frequencies. The language was Czech. Replaced in early 1990s by S05b.
Null format:
| Series of rapid beeps | 061 |
| 3-figure ID | |
| Repeated for 5 minutes | Repeated for 2 minutes |
Traffic format:
| Preamble | Message | Repeat | Outro | ||||
|---|---|---|---|---|---|---|---|
| Series of rapid beeps | 424 | 73 | 57966 85288 30427 ... | Opakuji | 73 | 57966 85288 30427 ... | Konec |
| 3-figure ID | Amount of 5-figure groups in the message | 5-figure single groups | "[I] Repeat" | Amount of 5-figure groups in the message | 5-figure single groups | "End" | |
| Played for 5 minutes | Repeated for 5 minutes | ||||||