350-801 CLCOR: Implementing and Operating Cisco Collaboration Core TechnologiesDemo

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QuestionQ214

Voice Gateways and Session Border Controllers

A company has recently received a CDR bill. After analyzing it, the administrator observes a vast number of transfers to the PSTN from incoming PSTN calls. How can this toll-fraud scenario be remediated?

  • A Set Service Parameter Block Offnet to Offnet transfer to true.
  • B Set Use Restriction attribute of ID/Name Presentation of Transferring Party to true.
  • C Block transfers on a per gateway configuration on Cisco UCM.
  • D Set Toll fraud TCL script on the gateway.
Explanation

Cisco Unified CM prevents toll fraud from external PSTN calls being transferred to another external PSTN destination by setting the Block OffNet to OffNet Transfer service parameter to True. With the applicable PSTN gateways or trunks classified as OffNet, this cancels external-to-external transfers.

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