I have tried port 27015 and no help there. I have also taken the VT1005V out of the loop and I am able to connect so Vonage is the problem even though Vonage tech says they don't use port 21. They suggested port 69 but that doesn't work either. All they can tell me is that my configuration is ok and it SHOULD work. I have a feeling that I either have to go through a router that I can configure or change the Vonage box.