I can't answer your question, but I have had the same problem for the past 11 months. Guess what...I just had cable installed Saturday! I got too frustrated calling and spending 45 min. doing the same diagnostic tests just to have them send out a tech to NOT solve the problem. I just got off the phone with verizon and they gave me my last month free, so I wouldn't have to pay the cancellation fee. Keep in mind,however, that they were able to see that my line wasn't working-so unless they can replicate some sort of problem, they may not be so forgiving. Good luck.