The direct CAC keyboard module allows connection with Lynx digital panels and some access control readers: proximity, fingerprint ... etc. On the panels, it allows calls to be made, by entering the corresponding code assigned to the home and incorporates access control functions by means of keyboard codes (previously programmed), activating the door opener by dialing a specific code. In access control readers based on the reader's own technology (type of interaction between the identifier and the reader), it would also allow access control functions using keyboard codes (previously programmed). Each technology can manage a number of door opening codes.