AT&T MERLIN LEGEND Release 4.0 Feature Reference page 105

Feature Reference
Display Operation
Caller ID information is displayed on MLX display telephones only.
The display shows
data arrives, when the Caller ID data is corrupted, or when no Caller ID data is
sent from the central office.
may appear if the caller has subscribed to a Central Office service that
blocks call identification. The phrase
call originates from a line or caller area without Caller ID or caller information, or
from areas run by different local service companies than your own.
Hyphens are inserted between the digits. Examples:
telephone number and
See "Display" for more information.
Normal Incoming Call
When a call comes in on a personal line or Shared SA button, the calling party
number information appears at the principal owner's extension. Incoming call
information is displayed on Line 1 of the first and second screens.
Group Calling
Caller ID information appears in the PRI Automatic Number Identification (ANI)
format without called party information.
Transferring a Call
The phone receiving the transfer displays standard incoming call identification
information until the transfer is completed. The second screen shows call
transfer information. Caller ID information appears on the display.
Calls returned after the transfer return interval expires also display standard
incoming call identification information.
Mode Differences
Behind Switch Mode
If a customer subscribes to both Caller ID and a CO's call-waiting service on the
same line, Caller ID information for the first incoming call is transmitted and
appears at the display. However, the communications system does not provide
the Caller ID information for the second (call waiting) call.
when the call is answered before the Caller ID
appear on the display if the
for a 10-digit number.
for a 7-digit
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Caller ID