A method and a device for updating a coefficient vector of a finite impulse response filter are provided. The update method includes: obtaining an updated step-size diagonal matrix for a coefficient vector of the FIR filter; and obtaining an updated coefficient vector of the FIR filter based on the updated step-size diagonal matrix.

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.

A system includes a customer network and a telephony server. The customer network is associated with an independent carrier (IC), a native carrier, or both. The customer network includes a call manager, a telephone gateway, an internet gateway, a first device associated with the IC, and a second device associated with the native carrier. The first device communicates with the telephone gateway via the call manager. The second device communicates with the internet gateway. The telephony server is associated with the native carrier. The telephony server supports traffic from the first device and the second device. The telephony server includes a PBX and a session border controller (SBC). The SBC communicates with the telephone gateway via a session initiation protocol (SIP) trunk.

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.

An electronic device includes a proximity sensor, a communication interface that communicates with an indoor unit of an intercom, and a controller. When the communication interface acquires a signal indicating receipt of a call notification by the indoor unit of the intercom, the controller executes processing to control the indoor unit of the intercom based on a gesture detected by the proximity sensor. An electronic device includes a proximity sensor, a communication interface that communicates with an outdoor unit of an intercom, and a controller. When the communication interface acquires a call notification from the outdoor unit of the intercom, the controller executes processing to control the outdoor unit of the intercom based on a gesture detected by the proximity sensor.

A first communication station of an intercom network is used in combination with a second communication station of the intercom network. The first and second communication stations are configured for carrying out real-time audio communication with other communication stations of the intercom network. The first communication station and the second communication station each comprise operating elements actuatable to provide direct audio communication with at least one of the other communication stations of the network, an audio input and a connection port or a communication module for connecting the communication station with another communication station of the intercom network The first and second communication stations each have a functionality including at least one of display brightness, speaker volume, programming of the operating elements, and microphone sensitivity that can be set as respective parameters.

A first communication station of an intercom network is used in combination with a second communication station of the intercom network. The first and second communication stations are configured for carrying out real-time audio communication with other communication stations of the intercom network. The first communication station and the second communication station each comprise operating elements actuatable to provide direct audio communication with at least one of the other communication stations of the network, an audio input and a connection port or a communication module for connecting the communication station with another communication station of the intercom network The first and second communication stations each have a functionality including at least one of display brightness, speaker volume, programming of the operating elements, and microphone sensitivity that can be set as respective parameters.

A doorbell system (1) includes a plurality of doorbells (2-1 to 2-n) each of which is attached to each residence and includes an operation unit (22) and a camera (26), and a control unit (4) capable of performing communication with the plurality of doorbells (2-1 to 2-n). The control unit (4) is configured to acquire position information of each of the plurality of doorbells (2-1 to 2-n) and an image captured by the camera (26), to generate target information about a target, based on the position information and the image, and to transmit the target information to an external device (3-1 to 30n) associated with a specific user.

An object of the present invention is to provide an emergency report system (1) that may detect that pressing of a phone call button (13) is continued based on a calling state retained even after pressing of the phone call button (13) is finished. The calling state is stored when the phone call button (13) of an interphone extension unit (8) is pressed inside a car (6). Storing of the calling state is retained even after pressing of the phone call button (13) is finished. Continuation of pressing of the phone call button (13) is detected by detecting storing of the calling state performed again, the storing being canceled at a time interval set in advance.

A doorbell system (1) includes a plurality of doorbells (2-1 to 2-n) each of which is attached to each residence and includes an operation unit (22) and a camera (26), and a control unit (4) capable of performing communication with the plurality of doorbells (2-1 to 2-n). The control unit (4) is configured to acquire position information of each of the plurality of doorbells (2-1 to 2-n) and an image captured by the camera (26), to generate target information about a target, based on the position information and the image, and to transmit the target information to an external device (3-1 to 30n) associated with a specific user.