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MERLIN LEGENDCommunications System Release 6.1
System Planning
555-661-112
Issue 1
August 1998
Customer Support Information
Page A-13Toll Fraud Prevention
A
■
In Release 3.1 and later systems, default local and default toll
tables are factory-assigned an FRL of 2. This simplifies the
task of restricting extensions: the FRL for an extension
merely needs to be changed from the default of 3.
■
Each extension should be assigned the appropriate FRL to
match its calling requirements. All voice mail port extensions
not used for Outcalling should be assigned to FRL 0 (the
default setting in Release 3.1 and later).
■ Deny access to pooled facility codes by removing pool dial-out codes 70,
890-899, or any others on your system.
■ Create a Disallowed List or use the pre-prepared Disallowed List number 7
(Release 3.1 and later systems only) to disallow dialing 0, 11, 10, 1700,
1809, 1900, and 976 or 1(wildcard)976. In Release 3.1 and later systems,
Disallowed List number 7 does not include 800 and 1800 and 411 and
1411, but Lucent Technologies recommends that you add them. Assign all
voice mail port extensions to this Disallowed List. Lucent
Technologies recommends assigning Disallowed List number 7.
This
is an added layer of security, in case outward restriction is
inadvertently removed.
(In Release 3.1 and later systems, voice
messaging ports are assigned by default to Disallowed List number 7.)
If Outcalling is required by voice messaging system extensions:
■ Program an ARS FRL of 2 on voice mail port extension(s) used for
Outcalling.
■ If 800 and 411 numbers are used, remove 1800, 800, 411, and 1411 from
Disallowed List number 7.
■ If Outcalling is allowed to long-distance numbers, build an Allowed List for
the voice mail port extension(s) used for Outcalling. This list should contain
the area code and the first three digits of the local exchange telephone
numbers to be allowed.
Additional general security for voice messaging systems:
■ Use a secure password for the General Mailboxes.
■ The default administration mailbox, 9997, must be reassigned to the
system manager’s mailbox/extension number and securely password
protected.
■ All voice messaging system users must use secure passwords known only
to the user.