AT&T MERLIN LEGEND System Reference Manual page 278

Features
Group Calling
Labeling
Multi-Function Module
Queued Call Console
When a user has a message from a co-worker, the display shows the name or
extension number (if no alpha label is programmed) of the sender and, on MLX
telephones, the time and date the message was left. On MLX telephones, an
unread message is marked with an asterisk (*). On analog multiline telephones,
an unread message is also marked with an asterisk (*), but no message
information is shown.
Messages can also be received from outside callers (if the telephone has a
voice messaging system) and from the system operator. Messages left by using
a voice messaging system are identified as "V" on analog multiline telephones
and "VMS" on MLX display telephones. Messages from the system operator are
identified as "A" on analog multiline display telephones and "ATT Operator" on
MLX display telephones.
Message-waiting indications received by a fax message-waiting receiver are
identified as "F" on analog multiline display telephones and "Fax" on MLX display
telephones. When the fax message waiting receiver has an analog multiline
display telephone, the display shows "Call," the fax extension number and "F."
Notes:
Return Call is not operable for messages received from a fax machine and
cannot be used to make a call to the fax.
The type of message indicated does not allow a calling group message-
waiting receiver to distinguish between a message left for the calling group
and a fax or personal message.
Users with display telephones who call an extension with a Posted Message see
the message on their display.
Users can leave messages for the calling group only if the system has been
programmed with a designated Calling Group Message Receiver. The receiver
also receives fax message-waiting indications directed to the calling group. The
message-waiting receiver cannot distinguish between messages left for the
calling group and fax or personal messages.
The labels stored in the Extension Directory appear on MLX display telephones
when users send each other messages. Messages include the name (the 7
character label) of the user who sent the message and the time and day the
user called.
Posted messages are created and changed using Labeling.
A single-line telephone with a Message LED connected to an MFM can receive
message-waiting indications.
A QCC system operator can use Leave Word Calling only by selecting the
feature from the display. A Send/Remove Message button is programmed as a
fixed feature on a QCC.
Messaging 2-229