Multiple Appearance Directory Number (MADN) is a key and lamp style feature that permits an endpoint user to have multiple appearances of a directory number. When the user answers or makes a call with normal appearance buttons, the other call party sees the name and number of the endpoint user. When the user presses a MADN call appearance button, the other call party sees the name and number of the user to which the button is associated instead of the endpoint user.
The user associated with a MADN button does not need a license or an active extension but must have an extension number. The administrator can configure up to 30 MADN buttons associated with the same user.