My sip provider is Peopleline in Vancouver. Now I'm using Linksys PAP2, everything is OK. Then I tried it with the softphone X-Lite, it's perfect. When I setup with OBi110. I can received other's call, but I can't call other number, because it told me "... reason 403".
In X-Lite, I just filled User ID, Domain, Password. So I think the sip provider is OK. But I don't know how to setup my OBi110.