We recently moved into an old house that had a control panel for phones, ethernet and coax connections. The problem was that it was a mess! Nothing was tagged, nothing properly connected or shared to the main line, the Xfinity guy who set everything up for us only got the bottom one working, but since we didn't have TVs in the house yet he couldn't verify that the rest worked. It's crazy because I feel like he should have such a tool to test but he didn't want to try it I guess. So instead of calling and contacting another technician, I figured that with the help of the internet and this tool, I could do it myself, and I did! I was able to see which coaxial cables went where and label them all and now I have working cables in every room. There were no instructions but it was easy to understand. The lower part, under which you unscrew the battery. It's a small speaker. So just plug the main unit (one in the shape of an L) where the line is being tested and then just go to the other end wherever it is and then screw a speaker to each line until you hear high frequency noise and BAM hear! this is your line Super light pizza.
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