Which feature in 3CX is specifically used for holding calls in a virtual space?

The feature specifically designed for holding calls in a virtual space within 3CX is the Parking Orbit. When a call is parked, it is placed in a designated "orbit" where it can be held until another extension retrieves it. This allows for greater flexibility, as it enables a caller to be temporarily put on hold and later picked up by someone else. Parking orbits are particularly useful in scenarios where the person intended to take the call is unavailable.

In comparison, the Conference Bridge is utilized for facilitating multiple participants in a call but does not function as a virtual hold space for individual calls. Outbound Rules pertain to setting up how calls are routed based on parameters like time and destination but do not involve holding calls. Failover Mode, on the other hand, relates to maintaining service continuity in the event of a system failure and is not related to call management functionalities like call holding.