What is IVR?
Interactive Voice Response is not necessarily related to VoIP technology.
Examples and benefits
An example of IVR is when you call a company or business, and then you hear “press 1 for technical assistance, press 2 for sales support, press 0 to speak to the operator”.
After you make your choice, your call is routed to an extension/call queue, or, for example, a voice message is reproduced to you. Otherwise you enter an IVR submenu which offers more options that you can select.