Instruction manual
Toll fraud job aids
15-2 Issue 9 May 2003
■ Sudden or unexplained inability to access specific administrative functions
within the system.
■ Employees complain of difficulty in obtaining an outside line.
■ Simultaneous direct inward system access (DISA) authorization code use
coming from two different places at the same time.
■ An upsurge in use on DISA or other trunks.
■ Unusual increase in customer premises equipment-based system memory
usage.
■ Unexplained changes in system software parameters.
■ Unexplained problems related to being “locked out” of the system or PIN
changes in the voice mail system.
■ Significant increase in calls from a single geographic area or from the same
automatic number identification (ANI).
■ Any discrepancies in telephone bills, such as unusual calling patterns, calls
to international locations with which the user does not normally interact,
and calls for which you cannot account.