If a complex installation with lots of rooms or treatment rooms is required, then a central control unit is used, which – as the higher-level unit – controls communication between up to 26 group central units. The central control unit serves as the central distributor between the various areas and is programmed accordingly. The central control unit is optionally available with pager and DECT function.
The smallest independent unit in a large system’s decentralised system is the patient’s room. Here, room terminals or room modules act as a control unit for a room and contain operating elements for triggering calls and marking presence. The other room units – such as the call buttons on the bed, the pull-cord button in the toilet and the room signal lights in the corridor – are connected to these terminals.