MITSUBISHI ELECTRIC R100 - Manual (Page 32)

3. Utilities
32 R100 Wireless Gateway
Chapter 3 - Software Configuration
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 drop-down menu. The R100
Wireless Gateway and ALL of its wireless clients MUST have at least
the same default key.
Key Index
The Key Index field lets you specify which of the four encryption keys
you use to transmit data on your wireless LAN. As long as the R100
Wireless Gateway 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 key index. If the R100 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 key index.
Network Key Rotation 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.