03.313GPPFraud Information Gathering System (FIGS)Service descriptionStage 2TS
There are three levels of monitoring of subscriber activities using FIGS.
Level 1 an accelerated TAP procedure associated with a mechanism such as Hot Billing is implemented in the MSC of the VPLMN.
Level 2 CAMEL is used to gather information, but only at the beginning and the end of the call.
Level 3 CAMEL provides full information on subscriber activities, as defined in GSM 02.31, i.e. call start and end times, and partial call records. Notification of the invocation of Explicit Call Transfer, Call Deflection, Call Forwarding, Call Hold and Multi Party Service is also given.