Which three statements about Courtesy Callback are true? (Choose three.)
A. Courtesy Callback reduces the time callers have to wait in a queue.
B. Courtesy Callback enables Cisco Unified Communication Manager to offer callers (who meet your criteria) the option to receive a courtesy callback by the system instead of waiting in the queue.
C. The caller who has been queued by Cisco Unified Communication Manager can hang up and subsequently be called back when an agent is close to becoming available (preemptive callback).
D. Courtesy Callback does not change the time a customer must wait to be connected to an agent.
E. If the caller decides to be called back by the system, they leave their name and the time they want to be callback.
F. You can schedule a callback for a specific time.
G. Courtesy Callback is supported only with Cisco Voice Gateway.
H. Courtesy Callback is not allowed with Agent Request API.
