Quatech RS-422 - Manual (Page 26)

Figure 14 --- Windows 95 Device Manager
9. Use the Logical COM Port names to access the serial ports on your
DSCLP-200/300 through your software applications. Note: The Logical
COM Port name is assigned to your ports by Windows 95. This name is
required by a Windows 95 application when accessing a particular p
DSCLP-200/300 User's Manual 21