magicjack stop computer speaker rings ringing how do can i to

How can I stop the ringing sound from also coming out of my computer speakers?

If you use your magicJack with a phone and you want to get rid of the ringing you hear coming out of your computer speakers, right mouse click on the magicJack icon located in the lower right hand traybar area of your computer screen and make sure the top menu item reads "Switch to Headset".