I use the Ooma setup. It has the capability of having 2 phone numbers. I kept my Ohio number that I've had for years and my second number is a local TV number. I bring the system with me when come down for the winter. There are many features available with this system. One is it will link up with Google Voice and ring your cell phone so you can receive you home calls when away. But the feature I like the best is: You can enter numbers you want to be blocked. Those blocked callers get a message that the number has been disconnected. Check it out at:
www.ooma.com
I also tried magic jack. It worked OK but I didn't like the fact that the computer had to be left on for it to work.
Bob