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In this section, we'll cover the how to build voice menus, often referred to as auto-attedants and IVR menus. IVR stands for Interactive Voice Response, and is used to describe a system where a caller navigates through a system by using the touch-tone keys on their phone keypad.

When the caller presses a key on their phone keypad, the phone emits two tones, known as DTMF tones. DTMF stands for Dual Tone Multi-Frequency. Asterisk recognizes the DTMF tones and responds accordingly.

Let's dive in and learn how to build IVR menus in the Asterisk dialplan!