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Caller ID operation
If the incoming telephone number matches the last seven
digits of a telephone number in your directory, the name
that appears on the screen matches the corresponding name
in your directory.
For example, if Christine Smith calls, her name appears as
Chris if this is how you entered it into your directory.
NOTE: The number shown in the caller ID log will be in the format
sent by the telephone service provider. The telephone service provider
usually delivers 10-digit phone numbers (area code plus telephone
number). If the telephone number of the caller does not match a
number in your directory, the name will appear as it is delivered by the
telephone service provider.