UNIVERGE SV8300 Features and Specifications Manual (ISDN/Q-SIG)
NWA-033632-001, Issue 1
Page 23
Malicious Call Trace
Malicious Call Trace
General Description
This feature allows a station and Attendant to send a Malicious Call Trace request to the network when a mali-
cious call arrives via an ISDN trunk.
Malicious Call Trace (hereinafter called MCT) is a supplementary service is intended to be used by called par-
ties to find anyone who has placed malicious calls (such as threatening calls and prank calls) on ISDN lines.
Note: This feature is available in Australia only.
Station Application
All stations
Attendant Console
Operating Procedure
To set MCT from a Multiline Terminal or Attendant Console
1. When a malicious call terminates to a Multiline Terminal or Attendant Console, press the MCT feature key
during communication. The MCT request message is sent to the network.
2. When this service is set, the LCD displays MCT for six seconds and the feature key lamp lights in red for
two seconds.
3. When the result of MCT is received from the network, the LCD displays MCT SET or MCT NG for six
seconds.
To set MCT from a Single Line Telephone
1. When a malicious call terminates to a Single Line Telephone, press the FLASH key (or momentarily press
hook switch) and dial the MCT access code during communication.The MCT request message is sent to the
network.
Service Conditions
1. MCT can be set only for incoming calls. It cannot be used when placing calls.
2. The MCT access code can be set on a Multiline Terminal and Single Line Telephone.
3. This feature is selectable by service restriction class and trunk route data.
4. MCT request is sent to the BRI/PRI trunk to resume communication between the station and trunk. After
that, a message indicating the result of MCT (OK/NG) is received from the ISDN network.
5. If the terminal is a Single Line Telephone, the user cannot check the result because it has no display func-
tion.
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