ICP DAS USA I-7540D - Manual (Page 113)

Step 6: Type “COM1” in left hand window, and then click Send button. Data will
be sent from COM1 of the Host PC through Path1 to COM1 of the
i-7540D and will be immediately returned through Path2 to COM4 of the
Host PC.
Step 7: Type “Virtual COM” in right hand window, and then click Send button.
Data will be sent from COM1 of the Host PC through Path1 to COM1 of
the i-7540D and will be immediately returned through Path2 to COM4 of
the Host PC.
i-7540D CAN-Ethernet Gateway User’s Manual (Version 1.4, April/2008) 113