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www.cooperbussmann.com/wirelessresources
Cooper Bussmann 245U-E Wireless Ethernet Modem & Device Server User Manual
Rev Version 2.19
Figure 32 WEP
Default WEP Key
One of the four keys may be selected as the default key and is used to encrypt transmitted messages from the
configured unit. A 245U-E can receive and decrypt a message from a module that has a different default key index
as long as each module has the same key configured at the same index.
Open or Shared Authentication Mode
WEP keys must be entered as pairs of hexadecimal digits separated by colons. Hexadecimal digits are in the range
0–9 and A–F.
WEP Open Authentication Mode
• Station sends an authentication request to the access point.
• Access point then authenticates the station.
• Station then associates with the access point and joins the network.
WEP Shares Authentication Mode
• Station sends an authentication request to the access point.
• Access point then sends a text-based message to the station.
• Station uses its own WEP key to encrypt the text-based message and sends it back to the access point.
• Access point then decrypts the message using its on WEP key and if the key matches it authenticates the
station.
• Station then associates with the access point and joins the network.
WPA / WPA2
When WPA encryption is selected, 128-bit encryption keys are internally generated based on the passphrase and
system address (ESSID). The passphrase must be between 8 and 63 characters long, and the passphrase must be
the same for all 245U-E units in the same system. For optimal security, consider using a passphrase consisting of
a combination of letters and numbers (not a simple word or phrase), as well as upper and lowercase. For example,
“WiReLeSs TeChNoLoGy 2010.”
