Refer to the exhibit. A technician is reviewing the search history details on a Cisco TelePresence VCS for a recent call that failed. What was the cause for the call setup failure?

On Cisco TelePresence VCS, local call policy (implemented via CPL scripts or the built-in Call Policy feature) evaluates each call and can issue an explicit Reject action. When the search history shows a policy-driven rejection with no authentication or registration denial indicators present, a matching call policy rule is the identified cause of the failure.

A registration deny list blocks devices from registering with the VCS, not individual call attempts from already-registered or traversal endpoints.

Authentication failures produce a separate authentication challenge or rejection event in the search history, distinct from a policy-based denial.

An unknown source alias origin would indicate a routing lookup failure rather than an explicit call rejection issued by a policy rule.