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For other uses, see IVR (disambiguation).  Interactive voice
response (IVR) is a technology that allows a computer to
interact with humans through the use of voice and DTMF tones
input via keypad.  In telecommunications, IVR allows customers
to interact with a company’s host system via a telephone keypad
or by speech recognition, after which they can service their own
inquiries by following the IVR dialogue. IVR systems can respond
with prerecorded or dynamically generated audio to further
direct users on how to proceed. IVR applications can be used to
control almost any function where the interface can be broken
down into a series of simple interactions. IVR systems deployed
in the network are sized to handle large call volumes.  It is
common in industries that have recently entered the
telecommunications industry to refer to an automated attendant
as an IVR. The terms, however, are distinct an