How to pronounce “touchtone” in English

You got a guy on a phone here. He's listening to the phone and it says, "Your call is very important to us. Please listen carefully as our menu options have recently changed. Forbilling, press one. For sales, press two. For technical support, press pi. If you know your party's extension, you may dial it in reverse order using your touchtone phone.To access the company directory, please hold your phone receiver over a stove and watch the patterns the steam makes when viewed against a dark background. To report a lost or stolen