Interactive Voice Response systems or IVR menus for short, are a phone system feature that allows incoming callers to interact with the phone system via their keypad (using DTMF tones) or through speech recognition. While it can be argued that IVRs are basically the same as AutoAttendants, there is a significance difference in that IVRs try to clarify what a caller is actually trying to achieve (get support, pay a bill etc) as opposed to connecting the caller with a specific extension or person.
