AT&T MERLIN LEGEND 555-601-010ADD - Manual (Page 22)

Introduction
Backup
Back up all system data regularly to ensure a timely recovery, should it be required.
Implement a regular offsite backup policy so that you will always have a current
backup, even if a disaster strikes your company’s office location. See the backup
procedures in Chapter 4 for instructions.
Toll Fraud
Toll fraud attempts through voice messaging systems and automated attendant
systems have grown dramatically. Toll fraud “hackers” access a voice mail or
automated attendant system, transfer through the system, and gain access to a
corporation’s interface to a Iong-distance network. This is a security risk that can
affect every telecommunications system with a voice mail or automated attendant
system. While AT&T is not responsible for the billing resulting from this toll fraud, we
wish to assist you in dealing with this problem.
To diminish the risk of toll fraud occurrences, we recommend limiting transfers. The
Transfer to Subscribers Only? parameter on the AUDIX Voice Power
System Parameter Administration screen allows you to impose a limitation while still
allowing callers and subscribers to use AUDIX Voice Power transfer capabilities.
By leaving the default setting to yes for this parameter, you can restrict transfers to
registered subscribers only. When a caller is instructed to enter an extension
number from the Automated Attendant, or when a caller enters an extension number
from the Voice Mail or Call Answer services, the extension entered is validated
against the subscriber database of AUDIX Voice Power. If the extension entered is
not in the subscriber database, the caller will hear “That is not a valid extension,” the
transfer is denied, and the caller will not have an opportunity to gain access to the
outgoing facilities of the telephone communications system. For more information on
this parameter, see the AT&T AUDIX Voice Power™/AT&T FAX Attendant System™
Planning and Implementation document (Document No. 555-601-202).
If the above transfer restriction is used, you should not assign special-purpose
subscribers (users with a mailbox but no telephone on the switch) to extension
numbers that start with the same digit(s) as switch trunk access codes (for
example, 9).
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