An intercom device and a method of recording an audio stream at the intercom device. The intercom device includes a user interface, a memory, and an electronic processor. The electronic processor is communicatively coupled to the user interface and the memory and is configured to receive a user-selectable entry from an input mechanism of the user interface. The electronic processor sets an away mode of the intercom device in response to the user-selectable entry. An audio stream is received by the intercom device from another intercom device. Are cord signal indicative of a request to record the audio stream is also received from the another intercom device. The intercom device records the audio stream in the memory in response to receiving the record signal when operating in the away mode.

A multiple dwelling house interphone system includes a communication management device that controls communication between the collective entrance machine and the mobile phone. The communication management device relays the communication to the mobile phone registered as a calling destination of the collective entrance machine to be linked to the dwelling room master device using a predetermined application based on a VOIP. When a predetermined registration operation to allow communication with the communication management device based on the VOIP is performed to link the mobile phone to the dwelling room master device, information list on mobile phones already registered relative to the dwelling room master device as a link target is transmitted from the communication management device having accepted the registration in addition to an application for a download, and the mobile phone that has downloaded the application displays the information list on a display section of the mobile phone.

Systems and methods for volume control over intercom trunk lines. One example method includes receiving, from a first keypanel coupled to a first intercom, a call request identifying a remote keypanel coupled to a second intercom. The method includes transmitting a trunk request based on the call request and receiving a trunk setup message. The method includes activating a first crosspoint to provide a two-way audio connection between the first and second intercom devices. The method includes applying a trunk gain value to the first crosspoint based on the remote keypanel and transmitting, with an audio gain based on the trunk gain value, an audio stream received from the first keypanel. The method includes receiving, from the second intercom, a gain adjustment value associated with the first keypanel and the remote keypanel and applying an adjusted trunk gain value to the first crosspoint based on the gain adjustment value.

A group pairing method of a wireless intercommunication system according to an embodiment may comprise the steps of: a master mobile device acquiring information about slave wireless intercommunication devices and generating a pairing list from the acquired information, and sorting the generated list according to a chain connection order; the master mobile device transmitting information about the sorted pairing list and chain connection order to a master wireless intercommunication device; the master wireless intercommunication device receiving the information about the sorted pairing list and chain connection order from the master mobile device and updating the pairing list thereof from the received pairing list, and transmitting information about the updated pairing list and chain connection order to the slave wireless intercommunication devices; and each of the slave wireless intercommunication devices receiving the information about the updated pairing list and chain connection order from the master wireless intercommunication device and updating the pairing list thereof from the received pairing list, and sorting the updated pairing list according to the chain connection order.

A group pairing method of a wireless intercom system according to an aspect includes: scanning, by a mobile device wirelessly connected to a master wireless intercom device, QR codes displayed on mobile devices respectively wirelessly connected to a plurality of slave wireless intercom devices to add the plurality of slave wireless intercom devices to an intercom group as members (‘intercom group members’); setting a connection order of the intercom group members by using the mobile device wirelessly connected to the master wireless intercom device; and wirelessly chain-connecting the plurality of slave wireless intercom devices to the master wireless intercom device according to the set connection order.

A rear display displays a driver image of a driver to a rear occupant. An operational information acquisition unit acquires operational information for changing a size of the driver image displayed on the rear display. An image control unit changes the size of the driver image displayed on the rear display, on the basis of the operational information acquired by the operational information acquisition unit. A sound control unit controls, at a time of generating a synthetic sound by combining a spoken voice of the driver with a reproduced sound of an AV source, a sound-level ratio between the spoken voice of the driver and the reproduced sound of the AV source, on the basis of the size of the driver image displayed on the rear display. A rear speaker outputs the synthetic sound generated by the sound control unit toward the rear occupant.

Systems and methods for volume control over intercom trunk lines. One example method includes receiving, from a first keypanel coupled to a first intercom, a call request identifying a remote keypanel coupled to a second intercom. The method includes transmitting a trunk request based on the call request and receiving a trunk setup message. The method includes activating a first crosspoint to provide a two-way audio connection between the first and second intercom devices. The method includes applying a trunk gain value to the first crosspoint based on the remote keypanel and transmitting, with an audio gain based on the trunk gain value, an audio stream received from the first keypanel. The method includes receiving, from the second intercom, a gain adjustment value associated with the first keypanel and the remote keypanel and applying an adjusted trunk gain value to the first crosspoint based on the gain adjustment value.

Systems and methods for volume control over intercom trunk lines. One example method includes receiving, from a first keypanel coupled to a first intercom, a call request identifying a remote keypanel coupled to a second intercom. The method includes transmitting a trunk request based on the call request and receiving a trunk setup message. The method includes activating a first crosspoint to provide a two-way audio connection between the first and second intercom devices. The method includes applying a trunk gain value to the first crosspoint based on the remote keypanel and transmitting, with an audio gain based on the trunk gain value, an audio stream received from the first keypanel. The method includes receiving, from the second intercom, a gain adjustment value associated with the first keypanel and the remote keypanel and applying an adjusted trunk gain value to the first crosspoint based on the gain adjustment value.

A mobile intercom device is described that is configured to facilitate the assignment and reassignment of functions during use. A plurality of button pairs, each including a talk button and a listen button, and a display screen are provided on the mobile intercom device. An electronic processor of the mobile intercom device is configured to display a list of alphanumeric identifiers on the display screen, each alphanumeric identifier in the list of alphanumeric identifiers corresponding to a different one of a plurality of channels on the intercom system. A selection of a first alphanumeric identifier from the list is received and a channel on the intercom system corresponding to the first alphanumeric identifier is assigned to a first button pair of the plurality of button pairs.

Systems and methods for volume control over intercom trunk lines. One example method includes receiving, from a first keypanel coupled to a first intercom, a call request identifying a remote keypanel coupled to a second intercom. The method includes transmitting a trunk request based on the call request and receiving a trunk setup message. The method includes activating a first crosspoint to provide a two-way audio connection between the first and second intercom devices. The method includes applying a trunk gain value to the first crosspoint based on the remote keypanel and transmitting, with an audio gain based on the trunk gain value, an audio stream received from the first keypanel. The method includes receiving, from the second intercom, a gain adjustment value associated with the first keypanel and the remote keypanel and applying an adjusted trunk gain value to the first crosspoint based on the gain adjustment value.