Door communication system for communication between a person in an external area of a building and a person in an internal area of the building, the external area being separable from the internal area by a door, having - an external appliance intended for fixed arrangement in the external area and having the following: - a signal operating element for triggering a signal function on the internal appliance; - an authentication interface (22, 221) for authenticating a person and/or a security token; and - a motion sensor for detecting a movement in the external area, - at least one internal appliance, physically separate from the external appliance, that is connectable at least from the internal area to the external appliance via at least one wireless communication connection; - an electronic control device, designed and configured to generate a release signal for opening a radio lock arranged on the door when an authorised person and/or an authorised security token is detected on the authentication interface (22, 221); - at least one presence simulation apparatus (8, 81, 82, 83, 84, 85) designed to simulate the presence of a person in the internal area in a manner perceptible to a person in the external area, the at least one presence simulation apparatus (8, 81, 82, 83, 84, 85) comprising at least one electronically controllable voice output provided on the external appliance; characterized in that the electronic control device is designed and configured to perform the following steps: - identifying, by means of control logic, that the motion sensor has detected a movement; - checking, by means of the control logic, whether within a predetermined period of time after the motion sensor is identified as having detected the movement - the motion sensor detects a further movement and/or - the signal operating element is operated and/or - an authorised person and/or an authorised security token is detected on the authentication interface (22, 221); and - generating control signals and, as a result, activating the presence simulation apparatus (8, 81, 82, 83, 84, 85) if the result of the check is that within the predetermined period of time - the motion sensor has detected a further movement and - the signal operating element has not been operated and - no authorised person and no authorised security token have been detected on the authentication interface (22, 221). - an external appliance intended for fixed arrangement in the external area and having the following: - a signal operating element for triggering a signal function on the internal appliance; - an authentication interface (22, 221) for authenticating a person and/or a security token; and - a motion sensor for detecting a movement in the external area, - a signal operating element for triggering a signal function on the internal appliance; - an authentication interface (22, 221) for authenticating a person and/or a security token; and - a motion sensor for detecting a movement in the external area, - at least one internal appliance, physically separate from the external appliance, that is connectable at least from the internal area to the external appliance via at least one wireless communication connection; - an electronic control device, designed and configured to generate a release signal for opening a radio lock arranged on the door when an authorised person and/or an authorised security token is detected on the authentication interface (22, 221); - at least one presence simulation apparatus (8, 81, 82, 83, 84, 85) designed to simulate the presence of a person in the internal area in a manner perceptible to a person in the external area, the at least one presence simulation apparatus (8, 81, 82, 83, 84, 85) comprising at least one electronically controllable voice output provided on the external appliance; - identifying, by means of control logic, that the motion sensor has detected a movement; - checking, by means of the control logic, whether within a predetermined period of time after the motion sensor is identified as having detected the movement - the motion sensor detects a further movement and/or - the signal operating element is operated and/or - an authorised person and/or an authorised security token is detected on the authentication interface (22, 221); and - the motion sensor detects a further movement and/or - the signal operating element is operated and/or - an authorised person and/or an authorised security token is detected on the authentication interface (22, 221); and - generating control signals and, as a result, activating the presence simulation apparatus (8, 81, 82, 83, 84, 85) if the result of the check is that within the predetermined period of time - the motion sensor has detected a further movement and - the signal operating element has not been operated and - no authorised person and no authorised security token have been detected on the authentication interface (22, 221). - the motion sensor has detected a further movement and - the signal operating element has not been operated and - no authorised person and no authorised security token have been detected on the authentication interface (22, 221).