Just for local info. Wildblue and Hughes Net are not the same people. But back to the Vonage issue, your service provider should have informed you that satellite internet connections do not support Vonage. Even if you increase to the higher service package
The WildBlue system is engineered to help offset the impact of latency, which is the delay caused by sending signals from the earth to the satellite and back again. However, there is a delay of about a quarter second as the signal travels up to the satellite and back down to the ground. For most applications this latency does not affect performance, however, there are some applications like voice over IP (telephone service delivered over the Internet, also known as VoIP), or real-time interactive gaming, where latency will have a noticeable effect on performance over the WildBlue network, as it would on any satellite-delivered service.
I hope this keeps you from spending more money trying.The reason I know this is I have Wildblue and my wife is the service rep. for them in theis area that we live.