AASTRA 4222 Office for MX-ONE (TSE) User Guide EN - Manual (Page 54)

Messages
Dialog 4220 Lite/Dialog 4222 Office 54
Message Waiting
If assigned this feature and your phone is diverted to an interception
computer, a function key (preprogrammed by your system
administrator) will flash when there are messages stored for you in the
computer. The messages will be printed out on a printer connected to
the computer.
To print out messages
Message
Х Ф
Press.
Note: Function key preprogrammed by your system
administrator.
On the 4222 Office phone, the display shows the identity of the
computer and the number of messages stored for you.
If you find that the notification of Message Waiting is intrusive or you
want to shut off the notification:
#91#*
Dial.
Acknowledgement tone.