Page 1176 of 1814 Malicious Call Trace Enhancements553-2901-301 Standard 9.00 January 2002The Malicious Call Trace feature has been enhanced to offer advancedcapabilities across an ISDN PRI network, as explained in the followingsections. For a description of the basic Malicious Call Trace feature, refer toFeatures and Services (553-3001-306).Functional enhancementsThe following enhancements add to the functionality of the basic MaliciousCall Trace feature:• For a call (from or to a Central Office on an analog CO or DID trunk), aspecial signal (hook flash and optional DTMF digit string) is sent to theCentral Office if the option is configured.• Alarm operation is maintained; however, the duration of the alarm is nowflexible (0-15 minutes), instead of being fixed at 15 minutes.• The malicious call can be recorded using a recording trunk, ifprovisioned.• The call trace record can now be printed on any Serial Data Interface(SDI) port with MCT defined as a user.• The flexible firmware flash can be transmitted on the EXUT and XFCOTcards. This functionality is used by the Enhanced Malicious Call Trace,Meridian 911, and Autodial Tandem Transfer features.• The MCT feature can be activated from a Meridian 1 set during theestablished state of the call or during call clearing when interfaced withAXE10 Australia on 2 Mb PRI trunks.MCT recordThe following enhancements to the Malicious Call Trace record have beenintroduced:• Prior to enhancement, during an established call, the user of a set havingMalicious Call Trace (MCT) Allowed Class of Service could invoke acall trace against the call. Activation of the feature resulted in the printingof a call trace record on the maintenance teletype terminal (TTY) of thesystem. The Malicious Call Trace record did not contain any identifier ofwhether the call was external or internal; the format of these records ischanged to provide information about the type of call (internal orexternal).
