Lucent Technologies 555-661-150 manual A-13

MERLIN LEGEND Communications System Release 6.1	Issue 1
Network Reference 555-661-150	August 1998

ACustomer Support Information

Toll Fraud Prevention Page A-13

In Release 3.1 and later systems, default local and default toll tables are factory-assigned an FRL of 2 and 3 respectively. 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 FRL of 2 on voice mail port extension(s) used for Outcalling. This allows calls to use the default local 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 Outcalling. 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 the system manager’s mailbox/extension number and securely password protected.