Uniden XCA4510 Owner's Manual page 30

3. The CHARGE LED will blink to
indicate that the Digital
Security Code is set to one
of more than 65,000 codes.
If the Base Unit loses power while the Handset is off the Base, the Digital
Code may be erased. When this happens, the Handset will not function. To
establish communication between the Handset and Base Unit:
1. Restore power to the Base
Unit, and place the Handset
back on the Base Unit.
2. The CHARGE LED will blink to
indicate that the Digital
Security Code is set.
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