D-Link DWL-7700AP Manual page 55

Using the AP Manager
DWL-7700AP User's Manual
Device Configuration > Security > 802.11g > WPA
Cipher Type: Select Auto, TKIP, or AES from the pulldown menu.
Group Key Update
Select the interval during which the group key will be vaild. 1800 is the
Interval:
recommended setting. A lower interval may reduce transfer rates.
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