3-8 Message Waiting Notification (1)
System Parameter
If "Message Waiting Lamp for Every Message" is set to "Yes", the system will turn on
the Message Waiting Lamp of the extension each time a new message is recorded in
the mailbox. (Default : Yes)
Setup -> UM Configuration -> 5.4 Parameters
Message Waiting Notification Tab
Message Waiting Lamp for Every Message
* Even if it is set to "Yes", each subscriber can decide whether to use "Message Waiting Lamp notification".