User`s manual

PCI Express Board User's Manual Driver Installation: Windows Vista/2008
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4. Click the port you would like to configure to highlight it, and then click Port Setting.
5. Select a COM number for the port from the Port Number pull-down list.
6. Select the Auto Enumerating COM Number option to map subsequent ports automatically. The port
numbers will be assigned in sequence. For example, if COM 3 is assigned to Port 1, then COM 4 (if not
already occupied) will be assigned to Port 2, etc.
7. Select an Rx FIFO Trigger from the Rx FIFO Level pull-down list. Rx FIFO trigger levels of High, Middle,
and Low are available, with the default set to High (120 bytes). Select Set the change to all ports option
to apply this Rx FIFO Trigger to all ports.