Uniden DSS7815 Owner's Manual page 45

You may receive any one of the following messages:
When a private name is received; Private
When a private number is received; Private
When a unknown name is received; Unavailable
When a unknown number is received;
Unavailable
When invalid data is received;
Incomplete Data
When an overseas call(0000) is received (New Zealand only);
overseas call
Data errors appear as " ."
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