AASTRA 4147 Medium for MX-ONE (TSE) User Guide EN - Manual (Page 52)

Messages
Dialog 4106 Basic/Dialog 4147 Medium 52
Messages
Manual Message Waiting (MMW)
If the called extension does not answer, you can send a message
waiting signal to that extension (if this feature is allowed). Received
messages are indicated with a flashing Message Waiting key.
Answer u
Lift the handset.
A call is initiated to the extension that requested Message Waiting.
Cancel MMW at your own extension u
Lift the handset. #31#
Dial. d
Replace the handset.
Order MMW to another extension u
Lift the handset. *31*
Dial.
z
Dial the extension number.
# d
Press and replace the handset.