Two-way 100 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second./500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Russian Telegraph system, attributed name VEZHA-S (ВЕЖА-C, Tower-S), usage claimed to be by Russian Ministry of Communications (Минкомсвязь России). Possible usage in meteorology under callsign RWD59. This signal has always been seen transmitted with another identical signal at another frequency, so it works on a two-way communication network. It's periodic transmission behavior is suspected to be ARQAutomatic Repeat reQuestAutomatic Repeat Query between the two users. Reported to be a very old Soviet-era system.
Logs have been posted attributed to this signal:
5.440,00 RWD59 - Moskva RUS PTTPush To TalkPress to TransmitMinistries of Postal, Telephone, and Telegraph Service (Soviet Agency) RUS-ARQAutomatic Repeat reQuestAutomatic Repeat Query 100/500
This mode's frequency range is between 2755 kHzKiloHertz (kHz) 10^3 Hz and 12165 kHzKiloHertz (kHz) 10^3 Hz.
- RadioScanner.RU Frequency Log, Moscow BAUDOT 50 and ARQ 100
- RadioScanner.RU Identifying VEZHA-C
- i-56578 swl VEZHA-C Russian Telegraph