Asus WL-500g Deluxe - Manual (Page 36)

3. Utilities
36 ASUS Wireless Router
Chapter 3 - Software Configuration
Wireless (Cont.)
WEP Key
You can set a maximum of four WEP keys. A WEP key is either 10 or 26
hexadecimal digits (0~9, a~f, and A~F) based on whether you select 64bits
or 128bits in the WEP pull-down menu. The ASUS Wireless Router and
ALL of its wireless clients MUST have at least the same default key.
Key Index
The Default Key field lets you specify which of the four encryption keys
you use to transmit data on your wireless LAN. As long as the ASUS
Wireless Router or wireless mobile client with which you are communicating
has the same key in the same position, you can use any of the keys as the
default key. If the ASUS Wireless Router and ALL of its wireless clients
use the same four WEP keys, select “key rotation” to maximize security.
Otherwise, choose one key in common as the default key.
Network Rotation Key Interval
This field specifies the time interval (in seconds) after which a WPA group
key is changed. Enter ‘0’ (zero) to indicate that a periodic key-change is
not required.