AT&T MERLIN LEGEND Reference page 30

Overview
Customer Originated Trace
The Customer Originated Trace feature allows a user to trace the origin of the
last call received on a given BRI line. This information is stored at the 5ESS CO.
To retrieve it, the user must contact a CO representative.
NOTE:
Use of the Customer Originated Trace feature depends upon the practices of the
local law-enforcement agencies. The local telephone company should be
contacted for details on the availability and use of this feature.
Multi-Level Precedence and Preemption
By using the Multi-Level Precedence and Preemption (MLPP) feature, the calling
party can identify certain calls as priority calls. Such calls ring with a priority ring
and, by government convention, must be answered by either the called party or
a designated backup station. At the CO, an MLPP call can "tear down" or
preempt a non-priority call to complete the priority call.
NOTE:
The use of the Multi-Level Precedence and Preemption feature requires a private
network. As such, MLPP is used primarily by the Federal Government.
BRI Features
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