how can a phoneline have both ac & DC? Answered
our phone lines have static, a friend told me to check to voltage (for ac to see if the cordless phone was the iussue) I check and the line has 110AC and about 52 DC. I unplugged the cordless phone and still get the ac voltage. most of the phone jack boxes show the dual voltage, but I have found one that only shows the DC, and no AC what so ever. How is this possible?