Introduction
In telephony, interactive voice response, or IVR, is a computerized system that allows a person, typically a telephone caller, to select an option from a voice menu and otherwise interface with a computer system. Generally the system plays pre-recorded voice prompts to which the person presses a number on a telephone keypad to select the option chosen, or speaks simple answers such as "yes", "no", or numbers in answer to the voice prompts.
The latest systems use natural language speech recognition to interpret the questions that the person wants answered.
Other innovations include the ability to speak complex and dynamic information such as an e-mail, news report or weather information using Text-To-....