Reasons For Missing Caller Id Information - AT&T SynJ SB67158 User Manual

Caller ID

Reasons for missing caller ID information

Reasons for missing caller ID information
There are also occasions when other information or no information shows for
various reasons:
On-screen message
Private caller
Unknown caller
The caller prefers not to show the telephone number and name.
Your telephone service provider cannot determine the caller's
name and telephone number. Calls from other countries may also
generate this message.
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Reason