It seem like Hughesnet is blocking third party VoIP since the launch of Hughesnet Voice. We have tried to speak with Hughesnet Technical support but they aren't confirming any blocking. We troubleshoot with other customers and saw that the ITP Adapter wasn't receiving any SIP packets. Which mean they are blocking SIP protocol.Wow! I would sure hope not. I've used SKYPE on my system without problems but I believe SKYPE uses TCP/UDP and not SIP. I'll also try to run a few tests with our Ring Central system, which does use SIP.