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Frequently Asked Questions
Question 29: How do I perform a Loopback Test for my RS-232 COM port?
Answer: Loopback Test provides an effective way to test your RS-232 COM ports or cables. By using CommFront's 232Analyzer software, you can test both your RS-232 COM ports and cables:
If you are testing your RS-232 COM port, simply connect Pin 2 to 3 of your DB9 connector (connecting RX to TX), then run the 232Analyzer software and send commands from the Send_Command_Pane, you should get an echo of the commands sent.
If you are communicating with a remote RS-232 device, run the 232Analyzer software on both ends of the PC and turn ON/OFF the line state or send commands from one end, and you should be able to see the changes or receive the commands on the other end.
By performing a simple Loopback Test like this, you can test both the RS-232 COM port and cable, which is very helpful when you have doubts about the performance of your COM ports or cables.
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