Hello guys,

I have a question regarding on Voice Over Internet Protocol.

I'm using a softphone on a PC, and I am behind a non UPnP Symmetric NAT, meaning to say, the codec called SIP protocol port: 5060 is blocked.
I have my voip service provider, but they tech help cannot help me.

So I cannot call on my PC, proxy servers are not working on this type of communication.

But a SIP outbound Proxy service will do here is the site where I found it: