TRIED TO SET UP THE CALL BLOCKER ACCORDING TO DIRECTIONS --ALSO LOOKED AT VIDEOS ON UTUBE...EVEN CALLED THEIR CUSTOMER SERVICE...THE HOME PHONE WON'T RING AT ALL....YOU CAN HEAR IT TRYING TO MAKE THE CONNECTION BUT NOTHING...EVERYTHING HOWEVER, LOOKS EXACTLY AS IT SHOULD.....IN ONE OF THE UTUBE VIDEOS, THE MAN HAD A PHONE EXACTLY LIKE OURS SO THERE WAS NO MISTAKE....i'M RETURNING ..MUST ASSUME THIS IS DEFECTIVE...THE ONLY GOOD PART WAS THE PHONE DIDN'T RING AT ALL!!