MERLIN LEGEND Communications System Release 6.0
System Programming
555-660-111 Issue 1
February 1998
Customer Support Information
PageA-13Toll Fraud Prevention
A
In Release 3.1 and later systems, default local 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 your system is part of a private network, assign Disallowed List 7 to
Remote Access.
If Outcalling is required by voice messaging system extensions:
■Program an ARS Facility Restriction Level (FRL) of 2 on voice mail port
extension(s) used for Out calling. This allows calls to use the default loca l
ARS table that is defaulted to an FRL of 2 and any other ARS routes with
an FRL of 2 or less.
■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 Outcallin g. This list should contain
the area code and the first three digits of the local exchange telephone
numbers to be allowed.
■In a private network, if your switch is outcalling only to non-local network
extensions, program the VMI ports with an FRL of 2.
Additional general security for voice messaging systems:
■Use a secure password for the General Mailboxes.
■The default administration mailbox, 9997, must be reassigned to t he
system manager’s mailbox/extension number and securely password
protected.
■All voice messaging system users must use secure passwords kn ow n o n ly
to the user.