If an error is detected with caller id, Note – Sony SPP-M920 User Manual
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Caller ID service (continued)
The caller's name or phone number will not be displayed in the
tollowing cases:
• The call is made through a telephone company that does not offer
Caller ID services (including international calls). In this case
"UNAVAILABLE" will be displayed.
CALL
#01
D
UNAVAILABLE
If the call was "blocked." For privacy reasons, many states allow
callers the option to prevent his or her telephone data from being
displayed on the other party's Caller ID display. If you receive a call
that was "blocked" in this way, "PRIVATE" will be shown on the
display.
CALL
#02
PRIVATE
If the call is from an office that uses multiple lines, the phone
number displayed may not match the number you use to call the
extension.
If an error is detected with Caller ID
when Caller ID information is incomplete, the display will change to
"TRANSMISSION ERROR LINE X."
TRANSMISSION
ERROR LINE X
This does not indicate a problem with your unit. Notify your
telephone company if it continues to appear often.
Note
O indicates that the data comes from LINE 1 and B indicates that the data
comes from LINE 2.
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Advanced Features