AT&T CL2909 - Manual (Page 35)

Caller ID operation
29
Caller ID operation
Display screen messages
Displays When
PRIVATE NAME The other party is blocking the name
information.
PPP The other party is blocking the number
information.
PRIVATE CALLER The other party is blocking the name
and number information.
UNKNOWN NAME Your telephone company is unable to
receive information about this caller’s
name.
UUU Your telephone company is unable to
receive information about this caller’s
number.
UNKNOWN
CALLER Your telephone company is unable to
receive information about this caller’s
name and number.
ERROR PRESENT The displayed caller ID entry cannot be
dialed.
NO NUMBER The displayed caller ID entry cannot be
dialed.