I have two Vonage lines at the house. One is used for the business and the other for the house. I also have an AT&T land line for the business fax.
In my mechanical room in the house where all of the equipment is located, I have a phone that is connected to the fax land line. In case Vonage goes out I can still make calls or dial 911 from in the house.
Before we had kids we disconnected our land line. My wife and I just used our cell phones. When the kids arrived, so did the land line....
