Related Documents - Avaya Communication Manager Administrator's Manual

Preemption
Preemption works with Precedence Routing to further extend the call routing capabilities of the MLPP
feature. Preemption, when allowed through administration, can actually tear down an existing, lower
priority call in order to complete a more important precedence call. Even non-MLPP calls are treated as
routine level precedence calls, and can be preempted.
When this occurs, the callers on the existing call hear a tone indicating that the call is about to be
preempted. The callers have three seconds to end the call before the call is automatically disconnected.
After the existing call is disconnected, the new call is placed using the preempted facility.
Announcements for Precedence Calling
In certain situations, precedence calls are blocked because of unavailable resources or improper use.
When this occurs, recorded announcements are used to identify what went wrong. The announcements
used for MLPP include:
•
Blocked precedence call
•
Unauthorized precedence level attempted
•
Service interruption prevented call completion
•
Busy, not equipped for Premption or Precedence Call Waiting
•
Vacant code
Line Load Control
Line Load Control is a feature that restricts a predefined set of station users from originating calls during
a crisis or emergency. Through administration, users are assigned to a Line Load Control level based on
their relative importance. When an emergency occurs, the administrator manually enables the feature to
restrict calling by users of lower importance. When the emergency is over, the administrator manually
disables the feature. For example, if a situation occurs that threatens national defense, station users in the
defense department will not be restricted from originating calls, but stations in the accounting department
will be restricted. When the crisis is over, the system can be returned to normal operation by the
administrator.

Related Documents

For more information on MLPP, see the following documents:
•
Multiple Level Precedence and Preemption (MLPP) Installation, Feature Description, and
Administration for Avaya Communication Manager (555-245-113)
•
Multiple Level Precedence and Preemption (MLPP) Operation (555-245-114)
Administrator's Guide for Avaya Communication Manager
November 2003
Feature Reference
Multiple Level Precedence and Preemption
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