AT&T MERLIN LEGEND Release 2.0 Analog Direct-Line Console Operator's Manual page 85

Features
N O T E :
You cannot check the status of co-workers' message
lights without DSS or Auto Dial buttons. If you send a
message, you may be turning off the message light that
was turned on by another operator.
Posted Message
Use Posted Message to let co-workers with display phones
know when you are unavailable. When a co-worker dials your
extension, the Posted Message you have chosen appears on
his or her display. To post a message, you need a
programmed line button on your console, but you do not need
a display console.
Co-workers can also post messages from their telephones.
When you dial their extensions, the message shows on your
display.
You can post 1 of 20 programmed messages. The 10
messages shown in the following table are provided by your
company. (Except for message 1, Do Not Disturb, they may
have been changed by the system manager or additional
messages may have been programmed.)
4-36 Messaging