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Configure Serial Device Port Dialog Box

Getting there

The options are:


Select the communications port to which your target serial device is connected.

Baud rate

Set the rate at which Reflection transmits and receives data through the selected serial port.

The baud rate setting must match the baud rate of your direct connection.


Set the parity for data transmission to and from the serial device on this port.

This setting determines whether a parity bit is generated for each character transmitted. Parity is used to detect errors in data transmission; the number preceding the slash indicates the number of data bits sent.

To use the multinational character set or 8-bit controls, Parity must be set to one of the values that offers 8-bit controls. If your communications link generates parity, and you set Parity to 8/None, multinational characters appear on your screen. In this case, set Parity to either 8/Even or 8/Odd.



It is possible for Reflection to transmit data to a serial device faster than the device can process it, or for a serial device to transmit data to Reflection faster than Reflection can process it.

Should this continue for too long, the slower system's buffer overflows and data is lost. If the serial device recognizes the XON/XOFF handshake, you can prevent the buffer from overflowing by keeping this value set to Xon/Xoff.

Xon/Xoff transmit pacing works as follows:

  • When the receive buffer has a limited amount of space left, an XOFF (DC3) character is sent as a signal to stop transmitting.
  • After processing most of the backlog of characters in the receive buffer, an XON (DC1) character is sent as a signal to resume transmission.

    The two systems continue in this stop-and-go fashion until all the data has been transmitted.

    If Hardware is selected, the RTS and CTS pins on the RS-232 serial cable control data flow.


Select a flow control method to use when Reflection transmits data to a serial device on this port.


Select a flow control method to use when the serial device on this port transmits data to Reflection.

Related Topics

Automatically Enable Serial Device-to-host Communications

Logging Data

Advanced Options Dialog Box for VT Terminal Types