Security Of Your System; Preventing Toll Fraud - Lucent Technologies MERLIN LEGEND Release 5.0 Maintenance And Troubleshooting Manual

MERLIN LEGEND Communications System Release 5.0
Maintenance and Troubleshooting 555-650-140
Customer Support Information
Security of Your System: Preventing Toll Fraud

Security of Your System:

Preventing Toll Fraud

As a customer of a new telephone system, you should be aware that there is an
increasing problem of telephone toll fraud. Telephone toll fraud can occur in many
forms, despite the numerous efforts of telephone companies and telephone
equipment manufacturers to control it. Some individuals use electronic devices to
prevent or falsify records of these calls. Others charge calls to someone else's
number by illegally using lost or stolen calling cards, billing innocent parties,
clipping on to someone else's line, and breaking into someone else's telephone
equipment physically or electronically. In certain instances, unauthorized
individuals make connections to the telephone network through the use of the
Remote Access features of your system.
The Remote Access features of your system, if you choose to use them, permit
off-premises callers to access the system from a remote telephone by using a
telephone number with or without a barrier code. The system returns an
acknowledgment signaling the user to key in his or her barrier code, which is
selected and administered by the system manager. After the barrier code is
accepted, the system returns dial tone to the user. In Release 3.1 and later
systems, barrier codes are by default restricted from making outside calls. In prior
releases, if you do not program specific outward calling restrictions, the user will be
able to place any call normally dialed from a telephone associated with the system.
Such an off-premises network call is originated at, and will be billed from, the
system location.
Issue 1
June 1997
Page A-12