My * box is connected to our office dsl. I have an 800# with livevoip and a sipura spa-2000 on our local office network. Our livevoip connection is using SIP/gsm and the sipura is configured for g726-16. The 800 extension just plays a couple of gsm sounds files and then goes to voice mail. When I call an extension via the sipura on the local network the sound is perfect, which I would expect. When I call the 800# via a regular landline I get a lot of static. I've also had regular static on similar voice calls going into a couple of other test boxes I have setup during the last week or so. Where should I start looking to find the cause of the static? Is this just normal for voip?