Proxim 7550 Manual page 42

WEP encrypts the data portion of each packet exchanged on the
802.11b network using either a 40-bit or 128-bit encryption
algorithm. 128 bit encryption is available only in the United
States. The available options for this parameter are Disabled, 40
bit, and 128 bit.
When WEP is enabled, all 802.11b devices within the same
Extended Service Set (ESS) must have the same Encryption
Keys to communicate.
Encryption Keys
An 802.11b device with WEP enabled uses an Encryption Key
or WEP Key to encrypt and decrypt information. If the Encryp-
tion Keys do not match on two radios, no communication will
take place between these devices.
For 40 bit encryption, the Encryption Key is expressed as 5 sets
of two hexadecimal digits (0-9 and A-F). The Harmony 802.11b
PC Card can support up to four 40-bit Encryption Keys. The
Harmony 802.11b PC Card can decrypt information that was
encrypted with any of its four Encryption Keys. A Harmony
802.11b PC Card will only use the default key to encrypt outgo-
ing information.
For 128 bit encryption, the Encryption Key is expressed as 13
sets of two hexadecimal digits (0-9 and A-F). The Harmony
802.11b PC Card supports one 128-bit Encryption Key.
Use the same default Encryption Key on all of the 802.11b
devices on your network.
Note:
In order to communicate with a Harmony 802.11b
Access Point when WEP is enabled, the AP and the PC
Card must use the same default Encryption Key.
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