AT&T MERLIN LEGEND System Reference Manual page 261

Features
Telephone Differences
Considerations
2-212 Labeling
Table 2-12 Continued
Message
Code
08 WITH A CUSTOMER
09 AWAY FROM DESK
10 OUT ALL DAY
CUSTOM MSG (nn)
11-20
Programmed labels cannot be shown on MLX or analog multiline telephones
without a display, or on single-line telephones.
If a label is not assigned to an extension, and a user leaves a message on
another telephone, the telephone's extension number is displayed instead of
the user's name. For example, an analog multiline display telephone user
sees "Call x1234" instead of "Call Wayne" on the display, and an MLX display
telephone user sees "* x1234 11:03" instead of "* Wayne 11:03."
If labels are not assigned to system operator extensions, display telephone
users see "Operator" and the system operator's extension when receiving a
call from the system operator.
If labels have not been assigned to outside lines/trunks, display users see
the factory-set label of "OUTSIDE" and the line/trunk number (such as Trk
810) when an outside call is made or received.
The label for outside lines/trunks can contain eight types of characters:
(capital Ietter, numbers, ampersand [&], dash, space, colon, asterisk [*],
and pound sign [#]).
With AT&T's INFO2 automatic number identification (ANI) service, the
information displayed also identifies the number of the caller.
Note: The availability of the caller identification information may be limited by
local-serving (caller's) jurisdiction, availability, or central office equipment.
The label for extensions can contain seven alphanumeric characters.
The label for calling groups can contain seven alphanumeric characters.
Posted Messages can contain 16 alphanumeric characters.
The system can have up to 20 posted messages. Ten messages are preset
at the factory and can be overwritten to create 20 custom messages.
The label for a System Directory listing can contain a maximum of11
alphanumeric characters.