Dell PP04S Owner's Manual page 79

From the Data encryption drop-down menu, select WEP .
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If the wireless network does not require a network key (for example, a password),
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go to step 8.
Click to uncheck the check box labeled The key is provided for me automatically.
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Enter the WEP network key, provided by your network administrator, in the Network
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key field.
Enter the WEP network key again in the Confirm network key field.
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NOTE: Your computer can take up to 1 minute to connect to the network.
Click OK.
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Your network setup is complete.
Setting Up a Home and Office Network
79