Motorola WR850GP - Manual (Page 110)

Troubleshooting Section 4
WR850 4-5
How do I match WEP keys between the router and my wireless clients?
Some wireless cards do not support WPA, and in turn cannot accept a WPA Pass Phrase.
For compatibility with these clients, WEP Encryption must be enabled on the SECURITY
Page of the Web-based Configuration Utility, with at least one WEP Network Key entered.
Using the utility provided with your wireless client, you must enter the same key that is
entered in the WR850. If more than one WEP Network Key is entered in the WR850, refer
to the Current WEP Network Key Index to determine which key to enter in your client
device, and then enter the Current WEP Network Key Index as the client’s Key Index.