Spec Sheet Preview: The Alpha Communications® IN024A 24-input Decoder Boards are used for a variety of applications. The primary use is for capturing up to 24 voltage (or dry contact) inputs from an entry intercom or call station (or up to 144 when used in a matrix configuration with some additional components), and sending the proper RS232 data to a PC which is running VisitorVerifier™ or AlphaEntry™ (or other) Alpha Communications® software. The IN024A boards are designed to easily surface mount right onto the finished wall by using the&nb …