2 WIRE AUDIO digital call pushbutton panel for wall mounted installation. The device consists in a pushbutton panel with 16 keys and a digital display for the display of the operating status. Through the recognition of previously saved numerical (SCS addresses) or alphanumerical codes (logic addresses), it can be used to call handsets, and to give residents the possibility of opening the door lock using a dedicated numerical code. The pushbutton panel can manage up to 4000 handset addresses (from 0 to 3999), and the direct call to the 2 WIRE switchboard. It has an internal contact (C Ã¢â‚¬â€œNO Ã¢â‚¬â€œ NC) for connection of an electrical door lock, or an external actuator (for the powering of the electrical door lock use an auxiliary transformer, item 336842). Connection (PL) for connecting a local door lock release pushbutton. System power supply cuts do NOT cause the loss of memory data.