FIELD: physics, communications.
SUBSTANCE: invention relates to controlling passenger address systems. The system for controlling and backing up devices for transmitting and reproducing notifications and informing passengers and workers at railway tracks of a station comprises interconnected message generator, information control system, analysing device, main and backup public-address amplifiers. The system also includes microphones, an automatic signal strength controller, a loudspeaker, controlled switches, a control signal generator, a transformer, a backup public-address amplifier, a message generator and a communication panel for the station duty officer.
EFFECT: high reliability of the control and backup system.
1 dwg
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