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DEFINITY ECS Release 8.2
Administrator’s Guide
555-233-506
Issue 1
April 2000
Features and technical reference
1422Malicious Call Trace
20
Once MCT is activated, information on the call is collected and alerts users in the
group. The alert is not a call, so it is not affected by queues at the user’s terminal.
If an MCT Voice Recorder is connected, it begins recording the conversation.
NOTE:
Any Bridging, Conference, or Intrusion tone connected to parties on the
connection are temporarily removed while the MCT Voice Recorder
connects.
Controlling MCT
The first controlling terminal to respond to an MCT alert becomes the controller
for the call. Alerting on any other controlling terminals stops.
To begin trace of an incoming call using the Malicious Call Trace feature, the
controller dials the 3-digit equipment location of the incoming trunk.
During alerting, the controller’s display shows the message “MALICIOUS CALL
TRACE REQUEST.” While this message displays, no information on incoming
calls displays.
When the controller pushes the MCT-Control button, information displays
identifying the called party. When the controller pushes the button again the
remaining MCT information displays.
MCT collects and displays three types of information, calling information as
follows:
■ If the call originated inside the system or on the same node within a DCS
network, the calling number displays.
■ If the call originates outside the system and an ISDN calling number
identification is available on the incoming trunk, then the calling number
displays. Otherwise, the incoming trunk-equipment location displays. In
this case, the user must call the connecting switch.
For all calls, the system displays the called number, the activating number,
whether the call is active, and identification of any other parties on the call.
Deactivating MCT
The controller deactivates MCT by dialing the MCT-Deactivate FAC.
Deactivation frees resources involved in the trace that were blocked. When all
parties hang up, the MCT Voice Recorder disconnects.