Interactive Voice Response systems provides you many features. Some of the features are following

• Sound: Play a sound during call
• Record: To record user voice during the call
• TTS: To do text to speech and play the output sound
• Excel: To read/write IVR data into an uploaded excel sheet
• DTMF: To take input from phone keypad
• Call Transfer: To transfer the call to another number
• Web: To do a web api call. Used for web lookup or posting data on a remote server
• Conference: To start a conference with another number