Point-to-Point with RTS/CTS

A scanner initiates a data transfer with an RTS (request-to-send) transmission. The host, when ready, responds with a CTS (clear-to-send) and the data is transmitted. RTS and CTS signals are transmitted over two dedicated wires as defined in the RS-232 standard. Used only with RS-232.

Point-to-Point with RTS/CTS (request-to-send/clear-to-send) is a simple hardware handshake protocol that allows a scanner to initiate data transfers to the host.