I would like to get rid of my land line and replace it with my iPhone, however I have about 3 phones around my house that I would like to keep working. So what I am looking for is a box that I can put it one spot of my house that will pair to my phone via bluetooth, then connect into my phone jack and allow the land line phones to receive a dial tone from the iPhone. Does something like this exist? Where would I pick one up? --Thanks.