AT&T DECT TL9178 - Manual (Page 56)

Caller ID
51
Caller ID operation
There are also occasions when other information
or no information shows for various reasons:
On-screen
message
Reason
PRIVATE
CALLER
Caller's name and telephone
number are not revealed at
caller's request.
PRIVATE
NAME
The caller's name has been set
as private.
PRIVATE
NUMBER
The caller's number has been set
as private.
UNKNOWN
CALLER
Your local telephone company is
unable to determine the caller's
name and telephone number.
Calls from other countries may
also generate this message.
UNKNOWN
NAME
Your local telephone company is
unable to determine the caller's
name.
UNKNOWN
NUMBER
Your local telephone company is
unable to determine the caller's
number.