What is a function of a System Call Handler in Cisco Unity Connections?

System Call Handlers in Cisco Unity Connection serve as automated attendants that answer calls, play recorded greetings, and provide menu options to callers. They direct callers to other extensions, user mailboxes, or other call handlers based on their input, effectively greeting and guiding them through the system.

Filtering incoming calls to prevent robocalls is typically handled by external call routing systems or specific security features, not by a standard System Call Handler in Unity Connection.

While call handlers can route calls based on various criteria, their primary function is not to "identify high-priority calls" in a general sense; this is more a function of call manager routing or specific application logic.

Placing calls in a queue is a function typically performed by Contact Center Express (UCCX) or Cisco Unified Communications Manager (CUCM) hunt groups with queuing features, not by a standard Cisco Unity Connection System Call Handler.