D-Link DWL-3200AP Manual page 55

DWL-3200AP User's Manual Using the AP Manager
Device Configuration > Security > WPA-PSK
Cipher Type: Select auto, TKIP, or AES from the pulldown menu.
Group Key Update
Select the interval during which the group key will be valid. 1800 is
the recommended setting. A lower interval may reduce transfer rates.
Interval:
PassPhrase:
Enter a PassPhrase between 8-63 characters in length.
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