Wireless Home Telephone Systems Is There A Wireless Telephone Jack System That Doesn't Need Power At The Remote Site?

Is there a wireless telephone jack system that doesn't need power at the remote site? - wireless home telephone systems

I need a phone in my house, where no cat or to quit. Is there a wireless telephone connection requires no power supply, when I call? There is a force in the vicinity of the other phone jacks, but you do not need to install the phone line.