Comtrol DeviceMaster DM-2000 Series Installation And Configuration Manual page 159

7. Right-click and remove the check mark on the Receiving COM port.
Neither COM port is sending or receiving data but shows Ready on the Status bar.
8. Reverse the sending/receiving windows one at a time. Set the Receive option first, then in the opposite
window, select the Send option.
The Status line shows Sending or Receiving in the reverse windows.
Data is now scrolling in the COM40 window. COM41 is static as it is not receiving data but transmitting data.
DeviceMaster Installation and Configuration Guide: 2000594 Rev. F
Troubleshooting and Technical Support
Troubleshooting and Technical Support - 159