priyom.org

Schedule

Transmissions between pairs of stations take place on fixed schedules, usually twice a day; although some days, especially on Sundays and North Korean public holidays, the second transmission is omitted. Links are initiated by one station calling the other, always the same and normally the bigger station of both (Pyongyang or Moscow hub, or big relay embassy). The start time can vary by more or less 10 minutes from the scheduled time, and may be delayed by the station being still tied up with another link.

The calling station starts transmitting on the scheduled frequency, and sends a QSX frequency to the peer station until it replies on it and the link is established. The QSX frequency in this schedule is only the primary choice, and is not guaranteed to be always used, depending on propagation conditions; less frequently, even the calling station can switch to a different sending frequency. All DPRK-ARQ frequencies are meant in LSB mode.

The modem IDs identifying stations on the link appear in the first byte of each DPRK-ARQ packet, and indicate the peer station - the destination of the packets rather than their source.

Pyongyang hub schedule

Pyongyang (0xD3) directly contacts selected stations in Southeast Asia.

UTC Frequency Peer embassy Initial QSX
Morning schedule
00:00 17415 Jakarta (0xC2) 16002
01:00 14635 0xBC 14749
01:30 16318 Phnom Penh (0xC8) 17463
02:00 16312 0xC4 16135
Afternoon schedule
07:00 14635 0xBC 14749
07:30 16133 0xC4 16135
08:00 16242 Phnom Penh (0xC8) 16318
18033 Kuala Lumpur (0xC3) 18035
18631 Hanoi (0xBD) 18421
08:30 16312 0xC6 17425
09:00 17415 Jakarta (0xC2) 16002

Moscow hub schedule

Moscow (0xA5) contacts 10 stations in Europe, 2 stations in North Africa, and 1 in Western Asia. It contacts Pyongyang via unknown means.

The embassy in Moscow is equipped with three different shortwave LPDA's, and has been observed to handle no more than three DPRK-ARQ links simultaneously, communicating with three different peer embassies at the same time. This simultaneous handling of multiple embassies is unique to Moscow and Pyongyang.

UTC Frequency Peer embassy Initial QSX
Morning schedule
06:30 13333 Sofia (0xAA) 13222
13888 Rome (0xB3) 13666
07:00 12775 Bucharest (0xA8) 14115
14449 Madrid (0xAC) 14555
15555 Cairo (0xCD) 16455
07:30 12115 Berlin (0xAB) 13015
12333 Prague (0xA6) 12444
13222 Tripoli (0xCE) 13555
08:00 10015 Warsaw (0xA4) 10311
12455 Stockholm (0xAD) 12444
12850 Vienna (0xB4) 12750
Afternoon schedule
12:00 12115 Berlin (0xAB) 13015
12455 Stockholm (0xAD) 12444
12775 Bucharest (0xA8) 14115
12:30 12345 Warsaw (0xA4) ?
12850 Vienna (0xB4) 12750
14530 Rome (0xB3) 14750
13:00 12222 Geneva (0xB5) 14444
12333 Prague (0xA6) 12444
15555 Cairo (0xCD) 16455
13:30 13333 Sofia (0xAA) 13222
14449 Madrid (0xAC) 14333
15555 Damascus (0xCC) 16222
14:00 13222 Tripoli (0xCE) 13555

Cairo hub schedule

Cairo (0xCD) contacts Kuwait City (0xCF), and Luanda (0x64). Its upstream destination is Moscow (0xA5), with which it contacts via HF at 07:00 and 13:00.

UTC Frequency Peer embassy Initial QSX
06:30 12450 Kuwait City (0xCF) ?
14:00 20888 Luanda (0x64) 21355

Caracas hub schedule

Caracas (0xD8) contacts Havana (0xDF). Its upstream destination is Madrid (0xAC), with which it contacts via unknown means. Havana is usually the side sending CQ requests to Caracas.

The 13:00 slot is used by Havana to deliver upstream traffic, while the 14:30 slot is used by Caracas to deliver downstream traffic.

UTC Frequency Peer embassy Initial QSX
13:00 14444 Havana (0xDF) 14850
14:30 14444 Havana (0xDF) 14850

Hanoi hub schedule

Hanoi (0xBD) contacts Kampala (0xE4), and a yet unidentified embassy (0xC7). Its upstream destination is Pyongyang (0xD3), with which it contacts via HF at least at 08:00.

The afternoon link to 0xC7 begins as soon as the 08:00 Pyongyang link completes, and is followed immediately afterwards by the Kampala link.

UTC Frequency Peer embassy Initial QSX
Afternoon schedule
08:xx 14245 0xC7 14020
08:xx 16244 Kampala (0xE4) 16020

Jakarta hub schedule

Jakarta (0xC2) contacts Vientiane (0xBE), and a yet unidentified embassy (MF26). Its upstream destination is Pyongyang (0xD3), with which it contacts via HF at 00:00 and 09:00.

UTC Frequency Peer embassy Initial QSX
Afternoon schedule
09:30 16312 Vientiane (0xBE) 16318

Madrid hub schedule

Madrid (0xAC) contacts Conakry (0xD2), Caracas (0xD8), and a yet unidentified embassy (MF71). Its upstream destination is Moscow (0xA5), with which it contacts via HF at 07:00 and 13:30.

UTC Frequency Peer embassy Initial QSX
14:00 16222 Conakry (0xD2) 16120

Tripoli hub schedule

Tripoli (0xCE) contacts Dakar (0xD6), Kinshasa (0xD5), and Malabo (0xD4). Its upstream destination is Moscow (0xA5), with which it contacts via HF at 07:30 and 14:00.

The afternoon link to Kinshasa begins as soon as the Dakar link completes.

UTC Frequency Peer embassy Initial QSX
Morning schedule
08:00 18115 Malabo (0xD4) 18035
08:30 16025 Dakar (0xD6) 16085
Afternoon schedule
14:30 18115 Malabo (0xD4) 18035
15:00 16025 Dakar (0xD6) 16085
15:xx 17450 Kinshasa (0xD5) 17415
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