It is crucial to note that you can tie handshake lines to fixed voltages. Handshake lines ensure a computer won’t transmit data if the receiving computer is not ready. There is one important reason why RS232 handshaking can serve you well: RS232 handshaking serves an important purpose. Thus, the RS232 handshake process enables the DTE to request control of the communications link from a related modem and allows the modem to inform the terminal equipment that the control has been acquired. With RS232 handshaking, RS232 communications only will take place when both ends of the RS232 link are ready. The DTR line remains in the “On” state while data is being transmitted.Īfter the transmission of data is completed, the DTE puts the DTR and RTS lines into the “Off” state and the DCE puts the CTS line into the “Off” state. The DTE puts the DTR line into the “On” state.Ĥ. The data communications equipment (DCE) puts the CTS line into the “On” state.ģ. The data terminal equipment (DTE) puts the RTS line into the “On” state.Ģ. The RS232 handshake process involves four steps:ġ. RS232 handshaking involves a step-by-step process. As a result, they enable you to enjoy successful RS232 communications and guarantee data can be exchanged quickly and efficiently.

Handshake lines also ensure line receivers can decode data without errors. There are several types of handshake lines, including: control signals that indicate data is ready to be sent and received across equipment. Successful transmission of data on an RS232 link requires handshake lines, i.e. A handshaking exchange begins the flow of data on an RS232 link.

Handshaker manual transmision