Ultra simple installation, I feared that in an old house the cpl do not work, but alone .It is true that the first time I plugged the cpl I was not getting link. Then I put them both at a distance of 20 cm it worked (call set green lights come on), then after I moved the cpl in a room and then in another. in fact the same for the third I plugged outskirts of a pretty close decision of 1 cpl they synchronize then after I moved to the third final decision. Very glad it works great.