What is the Callback Module used for?
A callback will hang up on the caller and then call them back, directing them to the selected destination. This is useful for reducing mobile phone charges as well as for other applications. Outbound calls will proceed according to the dial patterns in Outbound Routes. Generally you would point at to the destination to a callback you created from either a an IVR or directly from an inbound route directroute. Any module of your PBX can route the call to this destination.