I researched tried this product and then one day, while surfing the web, I found the following webpage: http://www.webwithwes.com/defeat.htmThis webpage details how you can do this with an average answering machine. I promptly returned my TeleZapper and now I use the tones from this website and it works for FREE.I thought I should share this with others who may be shelling out money for this worthless device.