The Buzzer

Enigma ID S28

Spectrum image S28_sample.jpg

Name The Buzzer, Жужжалка, UVB-76, UZB-76, MDZhB, ZhUOZ
Frequencies 4625, 6998
Status Active
Voice Live male and female operators
Emission mode Varies (H3E, R3E, J3E - all USB)
Location St. Petersburg, Russia (60th Communication Hub "Vulcan", Staff of the Western Military District) (transmition sites near St.Petersburg and Moscow)


Activity pages

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Known counterpart stations cw version on 5021 and 5096. South district networks Pip, Wheel and S4467

"The Buzzer" is a common nickname for a Russian Western Military District commandment network, which operates on the frequency 4625 kHz around the clock. The name comes from its signature channel marker used to keep the frequency clear - 1.25 s buzzing tone, followed by a 1.85 s pause.

The source of its transmissions is the Communication Hub #69 Iskra . According to our sources, its radio unit is located nowadays in the same place with Sudak communication hub (Agalatovo).  Messages are sent out in a format known as "Monolyth", using a circular callsign "MDZhB", assigned to the military units in the Western Military District.  Starting from 2016 network uses circular callsign ZhUOZ (ЖУОЗ). Also signals for 6th joined army with callsign Katok were sent a few times. There also are special command messages, for example КОМАНДА 145 (Command 145). It has been found that Command 145 means training alert (while Command 45 means real alert). By this command all personnel should arrive into assigned positions.

Signals with type "Uzor" can also be sent sometimes. The signal has no options and is in format CodeWord xx xx.

Buzzer transmitter site is 69th hub (callsign Iskra) own site located near Moscow. Occasionally 60th hub's transmission site near St.Petersburg is used, the site located in Kerro and has callsign Irtysh.

CW version of S28 signals can be found for example on frequency 4050 kHz. The transmission occurs simultaneously or a little bit before the voice signal transmission.

As you can see, the network has quite complicated structure. The structure is built using old equipment, which fails quite often, especially this is true for channelising equipment of relay lines. As a result, sometimes we have catched leaked phone calls, which came through Naro-Fominsk site, but not through Kerro and Murmansk. Also, sound quality is the best on Irtysh trransmitter (Kerro), which is the newest site amoung all (built in 1991).

The network is more probably organized using equipment 257Ц2 (комплекс технических средств дистанционного управления связью и обеспечения передачи сигналов централизованного боевого управления  "Монолит-АС" - Monolith-AC system for communications remote control and for transmitting central commandment control signals)

The Buzzer was first reported as early as 1976, and as late as 1982. Prior to 1990, its channel marker was a short, high pitched tone emitted every two seconds. Prior to September 2010, The Buzzer was transmitted from Povarovo near Moscow (ex-Transmission site # 143), and carried the callsign "UZB-76". Prior to April 14th, 2009, The Buzzer signal was continuous in the last minute of each hour. In September 2010, the transmitter was moved to present location, and its activity has significantly increased, due to much larger area to be covered (new Western Military District; The Buzzer formerly served the Moscow Military District) - some facts and faces about The Buzzer site move can be found here (in Russian).

The Buzzer has two simulcast cw networks on frequencies 5021 and 5096 kHz, please check our M32 log.

The Buzzer Stream

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