I tried this experiment, and it did not work.

I have a Panasonic phone, with a base station phone that wirelessly serves three other phones. The base is plugged into the first phone jack on the Grandstream. It works just fine that way, but I wanted to try a different configuration.

All the rooms in my home have a dual plug phone jack from the old days of having a second phone line so the other could serve the modem for the computer. Remember those heady days of the 14.4 and 28.8 baud modems?

I unplugged the base station phone, and carried it back into the kitchen where it was orginally parked and plugged it into the wall. I took a modular phone line, and hooked one end to the phone out jack of the Grandstream, and plugged the other end into the phone plug in the bedroom to see if the grandstream could push its signal to the kitchen jack. No joy. No dial tone, and the phone did not function. I infer from this experiment that the phone must be plugged directly into the grandstream, and my method would not work. Does anyone know why not?

I would like to push at least one connection out to the phone jack in my living room, so I can feed my Directv receiver. I know that there is a wireless jack available that should serve the same purpose, but I would love to use the existing lines, if possible.