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An Interactive Voice Response (IVRs) system is often referred to as a digital receptionist. An IVR plays back a pre-recorded message to the caller that asks them to press various buttons on their telephone depending on which department or person they would like to speak with. The IVR system will then route the call accordingly.
FreePBX IVRs allow any digits to be defined as destinations (for example, pressing one might route to the sales ring group). A destination of t can also be defined to route the call if the IVR times out without receiving any input. A destination of i can be defined to route the call if the IVR receives invalid input.