Avaya Communication Manager Administrator's Manual page 1618

Feature Reference
Multiple Level Precedence and Preemption
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Precedence Routing
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Preemption
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Worlwide Numbering and Dialing Plan (WNDP)
MLPP is enabled on the
CAUTION:
MLPP is currently designed to meet only GSCR requirements for connection to a DSN
(Defense Switched Network) by federal, state, or local government agencies, and as such
is not currently designed for use in commercial enterprise environments. Activation of this
feature in any other kind of network environment could result in unexpected/unwanted
feature operations.
Precedence Calling
Precedence Calling is the centerpiece of the MLPP feature. Precedence Calling allows users, on a
call-by-call basis, to select a level of priority for each call based on need and importance. The call
receives higher priority routing, whether the call is local or going around the world. Users may access
five levels of precedence when placing calls:
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Flash Override (the highest precedence level)
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Flash
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Immediate
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Priority
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Routine (the default, and lowest precedence level)
Each station user is administered with a maximum precedence level (the more important the user, higher
the precedence level). Users cannot originate calls at precedence levels higher than their maximum
administered level. Non-MLPP calls are treated as routine level precedence calls.
Precedence Routing
When precedence calls are destined for other switches in a private network, the Precedence Routing
feature is used to route the calls. The Precedence Routing feature routes calls based on three main criteria:
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Routing based on the destination number
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Routing based on the precedence level
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Routing based on the time of day
These routing criteria are administrable and can be changed as required.
Precedence Call Waiting
After a precedence call is routed, the called party may already be busy on another call. Precedence Call
Waiting allows the caller to "camp on" to the called party's line and wait for them to answer the call. The
caller hears a special ringback tone and the called party hears a call waiting tone. Depending on the type
of telephone being used, the called party can put the current call on hold and answer the call, or the called
party must hang up on their current call to answer the incoming call.
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System-Parameters Customer-Options
Administrator's Guide for Avaya Communication Manager
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November 2003