350-801 Question #458: Real Exam Question with Answer & Explanation

Question

A recent audit discovered incidents of toll fraud. Restrictions should include Cisco UCM class of service and supplementary services features. Which two actions in Cisco UCM prevent further toll fraud from happening? (Choose two.)

Options

• AImplement a class of restrictions on the gateway.
• BImplement transformation pattern for all off-net calls.
• CSet the service parameter to block off-net to off-net transfers.
• DRestrict international patterns on SIP trunk CSS to the gateway.
• ESet the call forward all CSS to restrict international patterns.

Explanation

To prevent toll fraud in Cisco UCM using class of service and supplementary services, implement transformation patterns for off-net calls and block off-net to off-net transfers.

Common mistakes.

• A. Implementing class of restrictions on the gateway is a valid security measure, but the question specifically asks for Cisco UCM class of service and supplementary services features.
• D. Restricting international patterns on SIP trunk CSS is a class of service feature, but transformation patterns and blocking off-net transfers are more directly aligned with the question's specific focus on preventing a wider range of toll fraud scenarios via number manipulation and transfer abuse.
• E. Setting the call forward all CSS to restrict international patterns primarily controls forwarded calls, which is a supplementary service, but blocking off-net to off-net transfers is a more direct and broader prevention of a common toll fraud method.

Concept tested. Cisco UCM toll fraud prevention

Reference. https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab12/collab12/srndtoll.html

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