I had the AT&T guy out two weeks ago, and he told me that "errors" can accumulate in the coax, which I found hard to believe. He wanted to install something that would cost me $150.00. I told him no, but now my cable isn't working again. Is he correct? Can errors pile up in what is basically a copper wire?
It might make sense if he said that the coax was causing errors on the line(bad/cut coax or bad end) and replacing the cable would fix the errors. I had a Comcast guy out just yesterday who said a line was causing errors on the whole main line, which his little graph machine clearly showed. Turns out all it was was a bad cable end hooked to a DTA, he replaced the end and the errors went away I thought it was odd that something as simple as a bad end could cause errors all the way back to a main line(very thick stiff line that feeds many distribution amps) but I saw it with my own eyes. No way anything "accumulates" in the wire though.