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.