Well still under going trial and error.
So far I am able to establish and internet connection and everything work fine for all intended purposes.
When I go to configure my Xbox i can achieve an Open NAT but get 100% packet loss to Xbox servers even though UPnP Teredo service is active.
I am not concerned about my VOIP service as I have mobile anyway but would like to use VPN features to remote access my network.
So with out VOIP everything is configured correctly as the Telstra Gateway.
At a total loss just like my packets :-(