Instruction manual

Malicious Call Trace Page 1961 of 3156
Features and Services
Enhanced Malicious Call Trace for Saudi Arabia
From a user’s perspective, the Malicious Call Trace feature activation
remains the same as it was prior to this enhancement. However, with this
enhancement the feature is now available for different types of analog and
digital (CO, DID, and DOD) trunks. In order to send the MCT request, a
special digit string is transmitted to the CO for an analog or digital trunk
interface.
Enhanced Malicious Call Trace for Australia
In Australia, MCT can be activated during the established state of the call
when interfaced with AXE-10 Australia on 2.0 Mbit Primary Rate Interface
(PRI) trunks. MCT can also be activated during the call clearing state of the
call (within a maximum of 30 seconds from the caller going on-hook). When
MCT is activated, a special FACILITY message with a Key Pad information
element is transmitted to the CO.
Trace Number (TRC) Key Lamp Status
The TRC key lamp status indicates the progress and success of the Malicious
Call Trace request signaling to the CO and availability of the recorder. The
following are the lamp states:
Lamp Winking
Activation of the TRC key changes the lamp from dark to winking (fast
flashing) if the trunk involved in the call requires the signaling to be done.
The lamp remains winking, indicating a transient state, until the call trace
request signaling to the CO has been completed.
In a Meridian Customer Defined Network (MCDN) tandem scenario, the set
which originated the call trace remains winking until a Facility message is
received from the node nearest to the Central Office. The user cannot invoke
MCT again while the lamp is in the winking state.
Lamp Lit
If the call trace request to the CO is successful and the recorder is conferenced
in the call, the lamp state is changed to lit.
In an MCDN tandem scenario, the lamp goes from winking to lit if a Facility
message received from the node nearest to the CO indicates that the MCT
request was successful. Activation of the TRC key during this state is ignored.