Edimax Technology EW-7722In - Manual (Page 67)

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A configuration window will appear after you switch the operation mode
to ‘AP’, which asks you to assign an existing network card with internet
connection.
If your computer has another network card which is connected to Internet,
please select it from ‘Name’ dropdown menu, and click ‘Enable ICS’; if
your computer does not have another network card with Internet
connection, please click ‘Not enable ICS’.
After you click ‘Enable ICS’ or ‘Not enable ICS’, you’ll see the basic
configuration menu of the AP function.