Chapter 22. Preventing Toll Fraud

Preventing Toll Fraud
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This chapter covers the following topics:

  • Explaining how legitimate devices can be exploited for fraudulent use of the IP PBX system to make toll calls

  • Using partitions and calling search spaces, restricting call forwarding based on user classes, and restricting voice-mail transfers to internal destinations

  • Explaining the usage of blocking commonly exploited area codes

  • Configuring Cisco CallManager to route calls to different locations based on the time of day when a call is made

  • Designing and implementing FAC to require user authorization for different classes of calls

  • Providing external call ...

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