magicJack and magicJack Plus Support, Reviews, FAQs and Tricks

I JUST INSTALLED MY MJ, AND IF I'M NOT AT MY COMPUTER I DON'T KNOW IF A CALL IS COMING IN. DON'T THE PHONES RING? I'VE ADJUSTED THE SOUND ON MY COMPUTER, BUT STILL NOTHING ON ANY INCOMING CALLS. IF I CAN'T HAVE A SOUND TO NOTIFY ME OF INCOMING CALLS I'LL HAVE TO SEND MY MJ BACK. WHAT ELSE CAN I DO?