Put simply, VoIP is a way of making calls across a computer network as opposed to using legacy phone lines. This can offer many benefits to the users which include calls not charged according to geographical boundaries. Your company offices, mobile workforce and international calls are all taken care of by your server.  To send data to the other side of the world is no more expensive than sending it to the person in the office next door.  You can receive calls wherever you are with a broadband connection:  on your land line, cellphone, PC or laptop, enabling you to visually interact with and manage your calls.