The main purpose of the TCP converters is to enable RFID authentication and access control for devices that lack a USB port, from older single-function printers to industrial robotics. They can be connected on one end to a Local Area Network (LAN) and on the other end to an RFID reader via USB cable. When the user presents a card to the reader, the information is sent over the network to a local server and depending on the response, a print job can be released or, in the example of industrial robotics, operator authorization granted.