A callback is a call target that will immediately hang up on a caller, call them back, and then redirect the call to another call target. This is most often used to avoid long-distance charges for remote agents who do not have access to a VoIP endpoint. This is especially relevant in the case of mobile phones where incoming calls are usually significantly cheaper than outgoing calls. The callback target may connect the caller with any resource on the PBX (such as an extension, the voicemail messaging center, or a queue), or it may be used in conjunction with DISA to give the caller a dial tone on the system from which they can call any telephone number they wish (more information on DISA is available later in this chapter in the Direct Inward System Access (DISA) section).
In order to set up a callback target, click on the Callback option under the Internal Options & Configuration section of the navigation menu on the left side of the FreePBX interface as shown in the following...