AT&T MERLIN LEGEND Reference page 69

F e a t u r e s
4. Dial the number of your outside call.
If the station being called is idle, an MLPP priority call alerts with a
distinctive MLPP ringing pattern. On the MERLIN LEGEND system, you
hear the priority ringing pattern (a four-burst ring on an MLX telephone
and a three-burst ring on an analog multiline and single-line telephone)
instead of the normal ringing pattern associated with an outside call (a
two-burst ring on all telephone types).
If the station being called is on a call and the call is being preempted by a
higher priority call, the person at the other end of the call hears an
announcement advising that "your call is being preempted. " The call is
cleared as if the person at the other end hung up. The station is then
connected to the priority caller.
If an MLPP priority call is not answered within a certain amount of time, the call
can be re-routed by the central office.
Considerations and Constraints
Stations should be assigned Personal Line buttons that have the same MLPP
privileges.
BRI lines with the MLPP feature assigned should not be mixed in the 5ESS Multi-
Line Hunt Group (MLHG) with BRI lines without the MLPP feature.
Mode Differences
In the Hybrid/PBX mode, BRI lines with different MLPP privileges should not be
assigned to the same pool.
Feature Interactions
Auto Dial The feature code assigned to MLPP by the local telephone company can
be programmed to an Outside Auto Dial button.
Directory The feature code assigned to MLPP by the local telephone company can
be programmed as an entry in the Personal or System Directory on an
MLX-20L telephone.
Speed Dial The feature code assigned to MLPP by the local telephone company can
be programmed as a System or Personal Speed Dial code.
Multi-Level Precedence and Preemption (MLPP)
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