In certain situations, precedence calls are blocked because of unavailable resources or improper use. The MLPP feature requires special announcements, for calls higher than Routine precedence, to notify users when Precedence Calling is denied, or when service is unavailable.
The announcements that MLPP uses include:
Blocked precedence call
This announcement plays when the system attempts to preempt an existing call with a call that has a precedence level higher than Routine precedence that is also equal to or lower than the precedence level of the current call. If an announcement extension is unassigned, the caller hears reorder tone (fast busy).
Unauthorized precedence level attempted
This announcement plays when a caller attempts to place a precedence call with a precedence level that is higher than the level that is authorized by the COR of the caller. If an announcement extension is unassigned, the caller hears intercept tone.
Service-interruption-prevented call completion
This announcement plays when a service interruption prevents a precedence call from being completed. If an announcement extension is unassigned, the caller hears reorder tone.
Busy, not equipped for Preemption or Precedence Call Waiting
This announcement plays when a precedence call is placed to a busy line, and the line does not have Precedence Call Waiting or cannot be preempted. If an announcement extension is unassigned, the caller hears reorder tone.
Vacant code
This announcement plays when a precedence call is placed to an unassigned extension. If an announcement extension is unassigned, the caller hears reorder tone.
If a caller is using Routine precedence and the call cannot be completed for any of these reasons, the caller hears busy tone.
No Circuits Available
This announcement plays when an outgoing call is blocked due to the Destination Code Control (DCC) feature.
Attendant Queue
This announcement plays when an incoming precedence call above Routine precedence level is placed in the attendant waiting queue.
Leaving DSN Network
This announcement plays when a call egresses Communication Manager over a trunk facility that is not assigned for DSN. The announcement is played to the caller and the call then proceeds to its destination. If the announcement extension is unassigned then the call proceeds to its destination without any notification to the caller.
