After that, open the File Menu and select 'New Connection'.First,create a connection to COM3 port.Say, you have a pair of virtual ports named COM3 and COM4. To launch a new HyperTerminal instance, head to Windows Start Menu > Programs > Accessories > Communication > HyperTerminal. As an example, we’ll consider testing COM ports with Windows HyperTerminal. Once your virtual COM interfaces have been properly set up, you can start testing. For this to be accomplished, you need to have at least two COM ports available in your system. With this type of connection, you can not only link two computers together but also provide communication between two apps installed on the same PC. One of the possible workarounds is using a null-modem cable, which allows connecting one program, e.g.
How to test a serial port with HyperTerminal You will immediately be able to determine if information is flowing through the connection with no data loss. With a loopback, line parameters like baud rate will not impact data transmission. A loopback can be very helpful when attempting to test how a specific port is handling data transfer.
Just make sure that the apps that will work with these COM ports support the port names you've chosen.
Now, you can either select the virtual serial ports from the dropdown list or specify them manually.