Unauthorized Use of Outcalling and
AMIS Analog Networking Call Delivery

Unauthorized Mailbox Use discusses how to prevent someone from breaking in to your system. This section discusses how to minimize the risk of someone who is already in your system from making unauthorized calls. In this case, the unauthorized usage could be from an employee or from someone outside of your organization who has breached your system security and gained access.

Outcalling Security

Outcalling is a Intuity AUDIX feature that allows the system to dial subscribers' numbers to notify them that they have new messages. Typically, message notification is forwarded to a call pager number. When this feature is enabled, four options exist to minimize toll fraud:

• The Intuity AUDIX voice ports can be assigned to a tollrestricted Class of Restriction (COR) that allows calling only within a local area.
• The outcalling numbers can be entered into an unrestricted calling list for either Automatic Route Selection (ARS) or Toll Analysis.
• Outcalling numbers can be limited to seven digits or 10 digits


 


Note: If outcalling to a pager is allowed, additional digits might be required.

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• You can restrict the use of outcalling for specific subscribers.

Restrict Outward Dialing

Restricting outward dialing can minimize the security risk associated with outcalling. To restrict outward dialing, you can assign an outward-restricted Class of Restrictions (COR) to the Intuity AUDIX voice ports. The method you use to make this assignment varies depending on the type of switch administered:

• For the G1, G3, and System 75 switches:
• Use change cor to display the Class of Restriction screen.
• Create an outward-restricted COR by entering outward in the Calling Party Restriction field.
• Assign the outward restricted COR to the voice ports.
• For the G2 and System 85 switches:
• Use P010 W3 F19 to assign outward restriction to the voice mail ports' Class of Service (COS).
• For the MERLIN LEGEND:
• A voice port with outward restriction cannot make any outside calls unless an allowed number list is used for specific area codes and/or exchanges that can be called. Outward restriction prevents or limits outcalling, AMIS analog networking, and fax call delivery.

Analog Networking Call Delivery

To increase security for AMIS analog networking, including the Message Delivery service and FAX call delivery, restrict the number ranges that can be used to address messages. Be sure to assign all the appropriate PBX outgoing call restrictions on the Intuity AUDIX voice ports. If your switch is a MERLIN LEGEND, also use an allowed number list.

Fax Call Delivery

There are no fax-specific security issues. However, since Intuity FAX Messaging requires that the AMIS Analog Networking feature be turned on, be sure that outgoing Intuity AUDIX voice ports have the appropriate PBX calling restrictions. Such restrictions are discussed below following Switch Administration and in Intuity AUDIX Administration.

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