Instruction manual

Page 1962 of 3156 Malicious Call Trace
553-3001-306 Standard 10.00 January 2002
Lamp Flashing
The lamp flashing (slower frequency than winkling) indicates that the call
trace request to the CO was transmitted successfully, but a recorder could not
be conferenced in. Activation of the TRC key during this state regenerates the
MCT record, activates the alarm, and again attempts to conference in the
recorder. The call trace request signaling to the Central Office is not
transmitted again.
Lamp Dark
This lamp state indicates an idle TRC key or failure of the call trace request
to the CO.
In an MCDN tandem scenario, the lamp goes from winking to dark if a
Facility message received from the node nearest the CO indicates that the
MCT request was unsuccessful.
Activation of the TRC during this state initiates all call trace elements again
including: transmission of trunk hook flash; conferencing a recorder (if one
is not already hooked in); generating an MCT record; and activating an alarm.
Operating parameters
The MCT feature is implemented on a system basis.
Assignment of the Trace (TRC) key cannot be done through the Attendant
Administration feature.
The Enhanced MCT feature is available with all telephone types except BRI.
The TRC key cannot be assigned as a soft key on Meridian digital telephones.
Any country using flexible firmware flash timing (60-1536 msec.) requires
the Generic XFCOT cards NTCK16AE or NTCK16BE, or the Extended
Flexible Universal Trunk (EXUT) card NT8D14BA. For any country not
using either the Generic Extended Flexible Central Office Trunk (XFCOT)
card or the EXUT card, the same functionality is provided by software
control.
The Multi-purpose Serial Data Link (MSDL) (or Downloadable D-channel
for the Option 11C must be used to support MCT for AXE-10 Australia
(2.0 Mbit PRI).