on the phone subject:

i have never tried the phone over ac line before so i couldnt tell you. i can tell you that there are 2 wires used per phone line pr1 should use red and green and pr2 use yellow and black. your idea will work just make sure that all the jacks in the house have the yellow and black hooked up. most of the time they are not because they are not normaly used. also check the telco box where lines come into the house to make sure they are connected.