An administrator has been asked to implement toll fraud prevention in Cisco UCM. Which tool is used to begin this process?

Class of Service (CoS), implemented through partitions and calling search spaces, is the primary and most flexible tool in Cisco UCM for controlling which phones can dial which numbers, and is fundamental to preventing toll fraud by restricting unauthorized or expensive call types.

Cisco Unified Mobility (Mobile Connect/Extend) allows users to receive calls on their mobile phones and desk phones simultaneously, but it is not a direct tool for toll fraud prevention.

Cisco UCM Access Control Group restrictions (RBAC) control administrative access to CUCM features and configurations, not call routing or toll fraud prevention for end-users.

The Cisco Unified Real-Time Monitoring Tool (RTMT) is used for monitoring, troubleshooting, and collecting diagnostic data, not for implementing call routing policies like toll fraud prevention.