Moxa Technologies CP-168U - Manual (Page 35)

Software Installation
Smartio CP-168U User’s Manual 3-19
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.