Introduction
To enhance security for the outcalling feature, you can turn off outcalling on a per- subscriber basis via the Subscriber Administration screen. You can also restrict the number of digits that may be used for outcalling on a
If your AUDIX Voice Power system is intended to serve only a subset of the telephone system users, the remaining users may be administered as AUDIX Voice Power subscribers with restricted mailboxes, so that the possibility of making transfers to these users is ensured. Restricted mailboxes can be set up by allocating minimal mailbox space (for example, 1 minute) to each of these subscribers. Other subscribers may address messages to these users, but the limited mailbox size will prevent most messages from being delivered.
Protecting your AUDIX Voice Power and FAX Attendant systems is a vital and important part of your responsibility as a System Manager. You should take every precaution to protect your company’s assets from both internal and external security breaches. AT&T does not warrant that these products will prevent (and AT&T will not be responsible for) unauthorized use (or charges for such use) of common carrier telecommunication services or facilities accessed through (or connected to) AUDIX Voice Power or FAX Attendant. The customer is responsible for administering AUDIX Voice Power and FAX Attendant to prevent such unauthorized use. Therefore, it is necessary that the person to whom the customer assigns this responsibility read all documents associated with AUDIX Voice Power and FAX Attendant and understand all features that enable the administrator to reduce exposure to unauthorized use.
Detecting Toll Fraud
Once you have instituted the appropriate security measures, monitor call traffic for the following signals of possible hacker activity:
■Employees cannot get outside lines.
■Customers have difficulty getting through to your 800 number.
■Usage is higher than normal.
■Heavy call volume on nights and weekends.
■Operators report frequent hangups.
■Telephone bill shows calls made to unusual places.
