Ooma Forums

In that case, there is something wrong with your wiring. Open up the jack you're connecting to the Telo and another that you're connecting to a phone, and describe the wiring you see in each one.

If your home was "home run" wired, the cable from each jack should go to a central location. The circuits must be tied together at the common location. Do you have a wiring cabinet somewhere such as the garage, utility closet, basement?