I use Vonage as my phone service provider. I have been having very scratchy calls lately for about the last month to the point where my friends didn't want to talk to me. I spent hours on the phone with Vonage to try and correct the problem. It turned out it was an old headset. When the copper wire gets degraded and the copper wire breaks down and frays, the broken connections come in contact with each other and make static. Quite annoying and very easy to fix. I just picked up a new plantronics headset and the problem was solved.