Loudspeaker with a front mounted sealing element and method of manufacturing such a loudspeaker

Monitoring and control system for a transport system having at stops (20, 21, 22, 23) anfahrenden vehicles (11, 12, 13) which (1) are provided via wireless links (30) with a control center in contact with the stops (20, 21, 22, 23) with the control center (1) via wireless links (40) are in contact, and that the stops (20, 21, 22, 23) comprise display means, which over the wireless links (40) of the control center (1) can be activated and upgradable.