User`s manual
Software Installation 
 CP-104UL User’s Manual 3-7
1.  Click on a specific port from the CP-168U Series Installation window, and then click on 
[Port Setting] to open the Port X dialog box. 
2.  Select a COM number for the port from the Port Number pull-down list. 
3.  Check the Auto Enumerating COM Number check-box to have subsequent ports mapped to 
continuous COM numbers. For example, if COM 3 is assigned to Port 1, then COM 4 will be 
automatically assigned to Port 2. 
4.  Select an Rx FIFO Trigger from the Rx FIFO Level pull-down list. Rx FIFO trigger levels 
from High to Low are available, with a default value is High Level (120 bytes). Check Set the 
change to all ports check-box to apply the just defined Rx FIFO Trigger to all ports. 
5.  Select a Tx FIFO Size from the Tx FIFO Level pull-down list. Tx FIFO Level from High to 
Low are available, with a default value is High Level (128 bytes). Check Set the change to 
all ports check-box to apply the just defined Tx FIFO Size to all ports. 










