Reasons For Missing Caller Id Information - AT&T TL86109 User Manual

Caller ID
Caller ID operation

Reasons for missing caller ID information

There are occasions when other information or no information shows for
various reasons:
On-screen message
L
Private name
Private number
Private caller
Unknown name
Unknown number
Unknown caller
It is a long distance call.
The caller prefers not to show the name.
The caller prefers not to show the phone number.
The caller prefers not to show the phone number
and name.
Your telephone service provider cannot determine
the caller's name.
Your telephone service provider cannot determine
the caller's number.
No information is available about this caller.
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Reason