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…

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.

Implementing a transformation pattern allows the manipulation or blocking of called numbers for off-net calls, which is a key class of service feature to prevent unauthorized calls to premium rate or international destinations. This ensures that outbound dialing patterns are strictly controlled before routing.

Setting the service parameter to block off-net to off-net transfers is a crucial supplementary service feature that directly addresses a common toll fraud technique where internal systems are used to bridge two external calls, often to high-cost destinations. This configuration prevents the system from being used as an unauthorized transit point.

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.

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.