The DTRFlowControlType property specifies the use of the data-terminal-ready (DTR) flow control after a connection has been ...

The DTRFlowControlType property specifies the use of the data-terminal-ready (DTR) flow control after a connection has been established. After a communication line has been established the DTR can be left in the following states: enabled, to show that the connection is still active; disabled, to ignore the DTR once received; or it can be used as a data flow control flag.