The bell signal can be reproduced as a voice output on the integrated loudspeaker of the ARAGON, for example “Someone has rung at the garden gate”. Thus, it is possible to receive in every room of the house the information at which door was rung. In addition, the motion detector of the Doorbird can be used, e.g. to switch on the outdoor lighting via a KNX switch actuator when it is dark. So you can confidently do without an indoor call station, because you can then talk and see each other with your smartphone or tablet.
The door opening function is not supported by voice control for security reasons.