Entryphone system e.g. for building with several flats

摘要

The entryphone includes a door unit (TSt) which is connected to all flat units (WSt1,WSt2) via a bus (B). Individual call signals for each flat are transmitted using bell buttons (K1,K2,Kn) and a codable transmitter (RC,S). A signal receiver (SE) for the bell signals is connected to all flat units via the bus. A circuit (STS) is switched on by the receiver when an assigned signal is received. The receivers in the flat units which are not called lock the switching on of the circuit.