I purchased this to add an extension phone line into my bedroom. Because of old wiring in the house, the phone jacks in my bedroom stopped working and no dial tone was available. While I use a cordless phone with the main base in the other room, I needed a phone jack so my Tivo could dial out and get programming information. When set up, the two units would be in separate rooms with a hallway between them. I purchased this unit from a store after the clerk assured me the range and quality was good enough that I could use it almost anywhere in my house. After a lot of effort, I find the unit to be nearly worthless.