Magic Jack is a voice over IP system, or VOIP, that is connected to a computer via a USB port. It provides phone service while eliminating high costs. The service allows you to call from a local United States number without getting roaming charges from any Internet connection. When you want to set up a two line system with one line connected to the Magic Jack and the other to another phone service such as a landline, it is possible to use two phone lines. Tips
