My one always out of service and I have to reset again. I am not sure if it is due to their network problem or my bad maid has done something to the cam (eg. on and off the power of my router and the cam frequently). That's why the link always return error when I want to see it.
i don't think register a domain will help for connect your IP cam on the street... if you want a stable connect it is better to get a fix IP for your home boardband but of course the cost is higher compare to the normal residential boardband....