Using the Redirector :: The Port Monitor

The Activity Panel

The Activity panel provides a real-time display of the status of all Serial/IP COM ports.

The virtual COM port number label for the row. This label always appears.
If a presets file is being used, the preset name for this port (if applicable) appears in the next column.

TD indicates data are being sent to the server.
RD indicates data are being received from the server.
TR (DTR) is the signal from the application to the server that the application has opened the virtual COM port. The most common use of DTR is to programmatically lower it to signal a modem to disconnect.
DR (DSR) is the signal from the server to the application that a modem or serial device is connected to the server and ready to communicate.
CD (DCD) is the signal from the server to the application that a modem has successfully negotiated a connection with another device.

The line signal indicators appear only when the virtual COM port is currently opened by an application.

The TR, DR, and CD indicators appear only if the COM Port Control protocol is being used or if the COM port options are enabled.