THIS WIKI HAS BEEN UPDATED FOR VERSION 13 OF YOUR PBX GUI
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 to the callback from an IVR or directly from an inbound route. Any module of your PBX can route the call to this destination.
How Do I Get to the Bulk Extensions Module?
From the top menu click Applications
In the drop down click Callback
Usage
See the User Guide