M12
| Enigma ID | M12 |
| Name | |
| Frequencies | |
| Status | Active |
| Voice | N/A |
| Emission mode | CW |
| Location |
Moscow, Russia; Khabarovsk, Russia
|
| Activity pages |
M12 is the Morse code mode of the Russian 7 operator.
Null format:
| 2 minutes | |
| 911 911 911 | 000 |
| 3-digit ID (thrice) |
Traffic format, single message:
| 2 minutes | |||||||
| 903 903 903 | 1 | 8603 | 63 | 8603 | 63 | 27073 15164 ... 79261 48334 | 000 000 |
| 3-digit ID (thrice) |
Message count |
3-digit or 4-digit group |
Group count | 3-digit or 4-digit group |
Group count | 5-figure single groups | |
Traffic format, two messages:
| 2 minutes | 1 minute | |||||||||||||
| 124 124 124 | 2 | 4582 | 132 | 4582 | 132 | 67540 37492 ... 19241 81259 | 124 124 124 | 2 | 8248 | 112 | 8248 | 112 | 94213 70216 ... 03679 52901 | 000 000 |
| 3-digit ID (thrice) |
Message count |
3-digit or 4-digit group |
Group count | 3-digit or 4-digit group |
Group count | 5-digit single groups | 3-digit ID (thrice) |
Message count |
3-digit or 4-digit group |
Group count | 3-digit or 4-digit group |
Group count | 5-digit single groups | |
The intro and the outro are slower than the rest of the transmission. Zero is sent as "T" - a single dash.
In case of an unexpected interruption during the transmission, the station restarts with the intro, repeated for one minute, followed by the current message continued from some groups before the failure; the preamble is omitted.
Most M12 schedules are twice weekly and consists of 3 identical transmissions 20 minutes apart. Each successive transmission is 1-2 MHz lower or higher in frequency. The third transmission does not take place in case of a null message. The frequencies are typically changed on a monthly basis.