A method for controlling an elevator system comprises receiving media data, receiving at least one of control data and sensor data, transmitting the media data and at least one of the control data and sensor data via a real-time data communication network between a central controller adapted for controlling a drive of the elevator system and a local controller, the local controller being provided in one of an elevator car control panel and a door control panel, wherein the real-time data communication network is adapted for transmitting data packets while ensuring that a data packet is transmitted during a maximal transmission time.