So from a quick search on netcomm this appears to be a wireless internet company. Not sure about this one but many of these companies do not give you public ip addresses.
Look in the router and see if you can find the wan ip address. First clue will be if it is a private ip address. Go to some site like whatsmyip and compare that ip to what the sites says your IP is. If they are not the same ip there is a NAT router in the path and you will never get port forwarding to run.
If you think the IP address is ok put the router in DMZ mode and run wireshark on the PC that is in the DMZ. You need to make sure you run as little as possible to not get too much traffic. When you attempt to send traffic to a port the pc should...