US Robotics USR5462 User Manual page 38

Configuring the 802.11g 54Mbps Router
WEP Encryption Type
You can choose between standard 40-bit/64-bit or
the more robust 128-bit encryption.
You may manually enter the keys or automatically generate
encryption keys. To manually configure the keys, enter five
hexadecimal pairs for each 40/64-bit key, or enter 13 pairs for the
single 128-bit key. For automatic 64-bit security, enter a passphrase
and click Generate. Four keys will be generated (as shown below).
Choose a key from the drop-down list or accept the default key.
Automatic 128-bit security generates a single key. (Default: Open)
Note:
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Active ASCII keys must be exactly 5 characters for 40/
64-bit WEP.
Active ASCII keys must be exactly 13 characters for 128-bit
WEP.