Interface device for intercom access control systems

An electronic device comprising:

• bus transmission circuitry including
• a first transistor electrically connected to a first input line, a first bus connection line, and a second bus connection line,
• a switch electrically connected to the first bus connection line, and
• a second input line electrically connected to the switch, the switch being transitionable between a closed state in which the second input line is electrically connected to the first bus connection line through the first switch, and an open state;
• a network interface;
• one or more processors;
• and
• one or more electronically-readable media storing instructions that, when executed by the one or more processors, cause the electronic device to
• receive first data using the network interface,
• store, based on the first data, first configuration settings associated with a first model of intercom system,
• receive second data using the network interface,
• send, over the first bus connection line, a first signal generated using the first input line and the first transistor based on the second data and the first configuration settings associated with the first model of intercom system,
• receive third data using the network interface,
• store, based on the third data, second configuration settings associated with a second model of intercom system,
• receive fourth data using the network interface,
• send, over the first bus connection line, a second signal generated using the second input line and the switch based on the fourth data and the second configuration settings associated with the second model of intercom system.