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USING MLPP
Multi-Level Precedence and Preemption (MLPP) facilitates emergency
communications for the military. MLPP enables authorized users to specify a
precedence level when making a call, and to preempt calls with a lower
precedence level.
To make a precedence call:
1. Dial the precedence access digit (a number between 2 and 9). Wait for
dial tone to end.
2. Dial the appropriate precedence level digit (a number from 0 to 3, such
as 1 for Flash). Note that if you have chosen a higher precedence level
than you are authorized to use, the system either routes the call to an
announcement or you hear an error tone.
3. Dial the ARS leading digit (if necessary) and the destination telephone
number (for example, 7-555-1234). If the destination is idle, the phone
will ring and you will hear the Precedence Ringback tone. If the
destination is busy and preemption is successful, you will hear silence
until the called party acknowledges preemption by hanging up. You will
then hear the Precedence Rin
g
back tone. The preempted parties will hear
the Preemption tone.
4. If the destination is busy and preemption is unsuccessful, you will receive
a Blocked Precedence Announcement (BPA). If you
g
et BPA, han
g
up and
then retry the call at a higher precedence level if you are authorized to
do so. If you get BPA and cannot retry the call at a higher precedence
level, you can call MLPP attendant and ask the attendant to place the call
for you.
5. Once you are connected, carry on your conversation. During the call,
your telephone set will display both the precedence of the call and its
duration.
6. When you finish the call, hang up.