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 pre-recorded 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.